I purchased this sample pad as an add-on for my electronic drum kit to expand the available sound at my disposal. The Alesis SamplePad did not disappoint in this regard. It has 25 on-board sounds that be arranged into eight banks of 4 (pads) each. Any sound can be assigned to any pad. The sounds cover mainly electronic-type snare and toms, percussion, cowbells and triangles/windchimes. There are no cymbals built-in but then it's not really designed for that.
Each patch can be adjusted for tune (+/- 4 semitones), level, sensitivity, pan, reverb, and midi note. The midi parameter is really useful as you can set it to send any midi note via the midi output to trigger external devices.
The built in reverb is no slouch either and it sounds very clear and present and does not have the sonic artifacts found in other cheaper reverbs I have heard.
Best of all the ability to load external samples from the built-in SD card reader. These samples can be assigned to any of the pads in any of the banks and can be tweaked with the same parameters as the on-board sounds. The only drawback to this that I can see is that the external sample playback is mono - but you can compensate for this by adjusting the pan and reverb settings.
There is an input for an external trigger such as another pad or cymbal and you can assign any sound or sample to it also. I use it with the Millenium MPS-200 cymbal pad (also from Thomann) to trigger a crash sample and it works flawlessly.
Overall, an excellent tool for any drummer who needs additional sounds on a budget.
Highly recommended and I'm very happy with it.