Yes it is. It can get annoying if you have great gas mileage: algorithm can start limiting your bottom time, and/or dive a different nitrox mix every dive: changing %O2 w/ single button can get old fast.
If neither of those is true, its main annoyance is the way it handles mandatory decompression: Buhlmann computers will recompute (reduce) your deco obligation after you move up and stay in the shallows for a while, Leo will be stuck on its originally computed stop. Or at least that's been my experience.
Downloading logs may be a hassle since it's using infrared and that's so 90's MircoFruit has dropped the drivers for it (or is trying to with every next build). Linux should work though. You'll also need the IR cradle for that, add $90 to the total cost.
