After reading a ton of reviews, seeing the comparison videos, and owning a 333XL I decided to get this beast. This amp is a monster in everyway. Tone is great and so many options with the 3 channels, 3 modes and 3 rectifier settings. Heavy duty construction, tons of features! The Infinium technology is worth it alone, midi capabilities, and levels for send and return of the effects loop make it very smooth. There are however, a few complaints.The vari power is almost unnoticeable in tone and volume change until the master volume is at about 3 or more. At that point the amp is so loud even with the vari turned all the way down that it defeats the purpose of Attenuating to a bedroom level. maybe more usable to control the volume without tone loss on stage. But this isn't a huge issue, between the channel and master volumes a bedroom level is achievable without major tone loss.The channels occasionally pop when changing and it gets fizzy when you push the channel volume above 7. But this is deffinately a loud amp. Deffinately worth it! If you want a true rectifier sound for less than $2,000 this amp is for you!