I had a SLO for close to 15 years. The first time I played one, it made me go 'whoa!'. They do one thing extremely well, high gain with punch and articulation even at high volume. They have a unique sound. The clean/crunch side of things were OK at best. The loop worked fine with pro rack gear, as that is what most guys were using in the 80's when it was designed. Mine seemed finicky with preamp tubes, mine seemed to like old Telefunkens the best. 100w of Soldano power proved to be the downfall for me, just too loud so I sold it. Kept my X88r and still have it. I tried a bunch of Friedmans, kind of reminded me of hot rodded Marshalls. For whatever reason, they didn't wow me enough to want to buy one.