CRESSILeonardo 2.0 Underwater Single-Button Scuba Dive Computer, 3 Modes: Air, Nitrox, Gage, User-Friendly Menu - Designed and Made in Italy

I've used this for 56 dives now and it works great. Great battery life, easy to use, easy to clean, durable. Yes it's a little big, but easy to see without bifocals underwater!

Fantastic computer and extremely easy to use. I decided to buy a computer since have started diving frequently and found that computer aren't that easy to handle, at least for me that I am Advance Open Water Padi and didn't dive with gases yet.This computer is pretty easy to use, with its single button interface. I set it up very fast, I could choose between metters or feet, celsius or farenheit, air or nitrox, safety factor (I used the default since I am a 'healthy' person) and other parameters that I never used. Since it has 1 single button, the way to use it is short press and long press, where short press is to change the menu and long press is to edit something.Once I got into de water, it was pretty easy to read (I have 1 point astigmatism in both eyes), with long press I turned the light on for a couple of seconds. Also the best features imho, are the heads up when I go up faster than I should do... it beeps and complains, in the safety stop it indicates easily the amount of remaining minutes. I feel much more confortable diving with it.I have just come from a dive into the Blue Hole in Belize where we dove at 40m depth (131ft) and it was my first dive so deep and using this computer made me feel more secure.The standard view into the water is the water temperature, max depth, current depth and current dive time. If you want to take a look you could check my fedepia84 youtube account videos in Belize (the name is "Scuba Diving in Esmeralda spot, Ambergris Caye, Belize"). Or you can check this video at the minute 5:30 where I test going up quickly to test the alarm heads up:[...](Note: if you above this note the "[...]" text is because Amazon removed the link, so you will need to search the name above or check my comment below on this review)The only little thing I think it might be a cons, is that the watchband is sort of long and is little annoying (check the screenshot and video) and in one moment I didn't notice that the watchband grabber got released... nothing happens but I could have lost it. Next time I'll make sure to grab it tightly.

There are quite a few unhappy folks regarding battery change concerns. It's possible some of these came from "over tightening" the battery cover or getting silicone grease from 0 ring onto battery contacts.I had no concerns at all, reset the clock/time of day which was on Central time after Cozumel. Set the SF (Safety Factor) to 1 from a 2, since 2 was ending the dive a bit early, which is totally appropriate; I'm going with setting 1 for next dives.The Leonardo's features are completely fine for all but extra-technical diving. (I have been PADI instructor since 1987) .. It handles Nitrox gas users easily, and the user handbook makes it clear to keep the 1.4 setting for all but extreme enhanced oxygen users in the 36 to 40 (02) range. I printed a full 87 page copy of the user book online and have it in a clear binder for easy reference. Recently I had to replace the clear plastic outer cover ($10.00 at Amazon and elsewhere)...inadvertently while I was using an aerosol sunscreen, some spray went down my arm and fogged the screen thru its small ports. It was still barely ok to use and the fog was not clearing up after soapy soaking, easy fix to pop off and pop on a new cover.Truthfully I cannot imagine paying many more hundreds of dollars for another brand. If you're looking for large easy to read numerals, water temp, max depth, No Decomp. time remaining, alerts for safety stop in minutes and feet, plus decompression dive details if you overstay your limits, this works beautifully.GBC

I'm in college and have to pay for all my equiptment on my own, so I did a lot of research into dive watches before making a purchase. This computer won out with both price and ease of use, but I was still a little skeptical because I ordered it from the Internet. It totally exceeded my expectations. I'm a new diver and haven't used any other computers, but I did an average of three dives a day on my trip and had no trouble with it. There were older, more established divers using fancy and expensive computers who had trouble getting them to work properly, but I didn't run into any problems.Just a few things: The watch strap was too large for me; I had to wear it on the tightest setting. One time the watch did not automatically turn on when I got in the water. I had to turn it on while descending, however it was still accurate in gauging depth. The watch is also conservative, I went into deco at one point when no one else did and it wanted me to do my safety stop for seven minutes. After holding me there for almost 12, my buddy and I got back on the boat despite the watch wanting to stay longer. It wouldn't set to let me dive after that, but resetting the system was simple and didn't erase any data from previous dives.All in all, a great value.

I will never be a great diver, but I do love to dive and I do so wherever I can. What should a diver like me own and carry around? Mask and snorkel are what I've chosen but I've added this dive computer. Although the single-button operation seems clumsy, it works very well in practice and adjustments are easy. Directions could be much better, but that can be overcome. Screen is easy to read, back-lighting is sufficient, and the audible alarm is almost disturbingly loud, but it's an alarm! I usually dive with Nitrox and this computer handles that task with ease. I use the most conservative settings, although one can change to less conservative. The wrist strap is long, but there's a great keeper to control it. Using Nitrox means that I must use a dive computer and I dislike depending on the dive company. I do like being able to track my own diving, too, and start being more responsible for my own safety.Perhaps a professional diver would need more bells and whistles, but I don't. I recommend this.