I was really hoping to write a favorable review when I first ordered this dive computer but unfortunately I am going to have to give it a 1 star rating. Overall it appears to be a well made piece of gear with easy to understand and use feature but ultimately all those are irrelevent if it is difficult to read the screen. I really feel that Cressi Sub missed the mark by not allowing for a higher contrast digital readout on their display. It is by customizable and the light display is nominal at best. It is unfortunate to say the least. After 40 years of diving on a regular basis for both work and pleasure I am fairly comfortable with my ability in reading gauges while on the water. For this reason and this reason only I have decided to return my purchase. Buyer beware, there are certainly more sight friendly alternatives on the market.
If someone reads this that happens to own a Leonardo please feel free to comment on your experience.

This works fine on the dive to track time, depth, and nitrogen; however, I was very disappointed to find out that it doesn't log time and depth for more than the most recent dive without the expensive PC link. Lack of logging relegates it to the role of backup computer, unless you are in the habit of updating your dive log after each dive.

Works really nice. Have some issues seeing it under water (probably should re-read the manual). Watch isn't as intuitive as I would expect although I really like having it and the alarms so I keep within the control limits. Band is HUGE (long) but don't be too quick to cut. It will come in handy if you have to wear a 7 mil wetsuit! I probably don't use all the capabilities although I'm a beginner diver and it helps me remember the key ones to make my dives safe!

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:
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(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.

So far this dive watch has proved to be exactly what I was looking for.

Features I'd hoped for:
-Basic dive planning
-Depth tracking (max and current)
-Dive time tracking
-Temperature

I purchase this based on the reviews and price point, at some point it will be my "back-up" computer, but I love it so far. The strap is a little long, but better to be too long than too short