Easy To Upgrade
First, so you understand where I'm coming from, I have regular access to a top-of-the-line Roland TD-30KV. I was looking for something cheaper to buy to use at home, and module sound quality was of little concern because I have a software library I prefer to use even over the Roland.
That said, I'll give the bad points first and then the good.
The worst thing about the kit is the "Real Feel" heads. They are very stiff and very loud -- clearly some marketing hack who has never touched a real drum set came up with the name. Fortunately, there are several methods of conversion. I bought a mesh head conversion kit from a company in the Netherlands. It arrived in 10 days, was every bit as easy to install as they claimed, and now this Alesis feels very much like a Roland (not to mention, it's much quieter). The conversion kit cost $125 US, but that means the total drums plus conversion cost is still only about 12% of a Roland and now the set plays very much like a Roland.
Some people really don't like the hi-hat controller. It doesn't bother me too much. All of the basic closed, open, stomp, and several semi-open modes are there, and that's good enough for me. Even the Roland 2-layer hat has its issues.
The sounds from the module aren't the greatest, but I wasn't any more impressed by comparable kits from Yamaha or Simmons. You can find some decent sounds for practicing, but I wouldn't go trying to cut an album with them.
It takes some time to dial in the trigger sensitivity settings. Don't expect just plug in and go. But the interface is fairly intuitive. I barely even had to consult the manual to figure out where the trigger settings were (perhaps that comes from my extensive v-drum experience with the Roland).
Overall, it's a great entry level kit and just fine when planning to MIDI it up to some other sound source. I'm a bit mystified why Alesis didn't spend the extra $100 themselves to make the kit a mesh head kit, but the conversion kits out there make it very easy to turn this kit into a fine-playing v-drum kit.