Let me start by saying - the MPX8 is a love-it-or-hate-it device. After using it for 3 months in both studio and live settings, I've got some strong opinions.
The good? Those 8 velocity-sensitive pads feel surprisingly solid for the price. When finger drumming, they respond well to different playing styles - though it took me about a week to adjust to the sensitivity curve.
Where this unit shines is as a simple sample trigger for live performances. Loading my custom sound effects (thunder, chimes) via SD card was straightforward once I followed the manual's WAV format requirements. The standalone operation without needing a laptop is a game-changer for gigging musicians.
Now the frustrations: Loading times are painfully slow (2+ minutes for larger sample kits). The interface feels like it's from 2005 - naming files using that tiny dial is an exercise in patience. And yes, that weird reverb/panning issue mentioned in negative reviews does occasionally pop up.
Pro tip: Use Audacity to prepare your samples in advance and keep files under 30MB per kit. This avoids most of the loading headaches.
Is it perfect? Far from it. But at this price point, nothing else offers this combination of pad quality, MIDI control, and standalone sampling capability. Just go in knowing its limitations.