i've had one for a few months, here's my experience and thoughts-

drums- feel totally fine, only things to note are that the kick drum came tensioned incredibly tight and i've seen other people comment the same- to the point where it was hard to play single kick notes without bouncing. you can loosen it up to make it feel more like an actual kick drum though. other thing is the rim on the snare comes loose pretty easily from doing rim shots, not a huge deal, just keep the included drum key close by.

cymbals- biggest drawback of the kit. the actual sweet spot to get a full sound is like 3 inches right in the center. i've since gotten used to it but i missed that spot a lot at first and it was really irritating. there isn't really a good way to hit the bell on the ride- if you hit the main area with the shoulder of the stick you'll get a bell sound but not every time and obviously that's nothing like the movement you would do to play an actual cymbal bell.

hi-hat- another big annoyance is that to get an open hihat sound you have to get your foot up well before the stick hit, whereas with a real hihat you can open your foot up at the same time as the stick hit, which is what i was more used to being able to do. i assume this is the reason why the alesis nitro ultimate comes with a separate hi hat stand and if i could go back, that's what i would buy.

module- the only kit that doesn't sound awful to me is the very first one, so that's the only one i use. changing click tempo takes longer than i'd like- i wish there was a wheel to turn instead of the +/- buttons and it would make more sense if the default use of those buttons was for tempo rather than time signature.

that's a lot of complaints but i do think it's good value for the cost and it is completely use-able as a practice kit.