I was initially hesitant to purchase this because I thought it was too small. But when I received it, I was pleasantly surprise to discover that it's a nice size dive computer.I wanted something big, so that I could easily see the text underwater.Here are the main reasons I purchase this dive computer:1. The dive computer batteries are user replaceable. I personally would NEVER ever buy a dive computer that requires me to send it to the manufacture in order to replace the batteries. (IMHO) that's ludicrous.2. It's in the list of the best dive computers for 2024 in dive magazine. (https://divemagazine.com/scuba-diving-equipment/the-best-dive-computers)3. The price is great for a computer with such features.4. I don't have to buy everything all at once. I plan to buy the tank transmitter ($330 [https://amazon.com/dp/B076KKR748]) on next year's dive trip, and then purchase the up link cable ($77 [https://amazon.com/dp/B01M0SUP1V]) on the dive trip after that. FYI: If you want to purchase the dive computer and transmitter at the same time, check out the following link where you'll save $70 if you purchase them together: https://amazon.com/dp/B075THRVVB5. It supports up to 3 tank transmitter. I plan to purchase a 2nd transmitter down the road, and even if I never use it for multiple tanks, I'll use it to monitor my buddy's tank, which usually happens to be my younger sister.The only complaint that I have is that it doesn't come with the manual. You have to download the manual from the web site.https://www.mares.com/en_US/quad-air-2You do get a booklet that looks like a manual, but it's a booklet with warnings in a 1000 different languages!!! And that's where it gives instructions on where to download the manual.Now I get it. The manufacture wants to make sure users read the warnings before they jump into the manual. But (IMHO) it's still annoying.With that said, I still give this dive computer 5 stars and I recommend this purchase.