I got this for multiple reasons.
1. I wanted to be able to leave my amp at home sometimes because it is heavy. My amp has an FX loop, and this replaces it without any issues.
2. I wanted to practice silently at home.. Simplifier has an aux input and headphone out so that makes it ideal for that purpose.
3. Multiple amps and sounds. It has 6 preamps, 6 poweramps 3 cabs and 3 mics, plus any combination in between. More than enough for any need. Perfect for gigs, practice, studio...
4. Backup for gigs if my amp dies.
The build quality is perfect, no issues here..
Don't be intimidated by many knobs, it behaves as a 2 channel amplifier and once you start playing with it, it becomes really simple. You can set it up in a matter of minutes and get a great tone.
Tones are pristine, clear, enough bass, the pots react to changes as one would expect, so the toneshaping possibilities are endless.
The main reason I fell in love with it is the way it responds to guitar volume pot and playing dynamics. It really is like a good tube amp, if you play hard, it overdrives, if you play light it cleans up, if you roll the volume down it cleans up, and in this aspect it is just perfect. Also, there is no latency or that weird feeling when you play other digital modellers, it really feels just like an amplifier.
The only "issue" I got (not issue, does not make a difference to me) - there is a slight buzz in headphones when nothing else is connected to it. It happens because there is no grounding, and it is mentiones in the manual. Does not happen when I connect other pedals or through a mix.
All in all, if you want to go ampless or need to practice silently or need something for the studio, just get this.. simple, effective, gets the job done, sounds fantastic, feels fantastic.
If you are here, just buy it.