This was my workhorse for hundreds of gigs.  Solid mixer.  Still works, just don't use it anymore since I bought an S9 and then I retired from the industry several years ago.  Always transported in a case and stored in a climate controlled storage unit. No spills.   One of the channels drops volume by about a third on occasion, either channel 1 or 4, since those were the ones used the most;  when I was really worried about it happening I would just change channels, no biggie.  Don't remember which one it was and couldn't replicate it while testing, so it doesn't do it all the time.