I gig regularly with my QS8 and probably will for a long time to come. I own several, and leave them set up in various places where I rehearse, and one in the basement where I work on patches. I leave an additional one in a travel case for gigs. All of my patches come with me on an SRAM card, so it's plug-and-play wherever I go, with no setup and tear-down except at gigs. Just plug in the card, turn it on, and it's now identical to the one in my basement! I'm sure the QS8 is not the only board that can perform this trick (some modern boards must be able to load entire performance banks on and off of, say, USB sticks) but because it's so cheap out there in the wild, it actually becomes practical to own many of them and just carry around the patches, instead of the board. I love it!
Of course, this wouldn't matter if the QS8 had lousy sounds or bad action, but far from it -- I love the action, and still think the AP and EP's sound great! (Those sounds are what made me buy my first one brand new, back in, maybe 1998?) The pads are very nice, many of the synth leads and basses are excellent, drums are nice, brass and strings are ok. Never cared for the organs very much, but I made a custom one that I run out through a Vent II, and it's good enough to get through a song or two.
Another thing this board gives me is complete control over every sound in a mix, operating on every MIDI channel, with splits and layers however and wherever I feel like making them -- no "preset split points" or other limitations. Again, I know that there must be modern boards that are this configurable, but it seems like many of them assume I'm only going to need, oh, 2-3 layers at most, and maybe one or two split points that can go here or here, but not there. Say what? I would never settle for that!
20 years later and I'm still learning what this board can do! dB, I am so grateful!