1). It's really well-built, has tons of features & the sound quality is really professional - really nothing to complain about.
2). It has some added uses - about which you might have not known:
- it is a great practice tool - on its own - you can just plug-in your headphones to it and have a good time practicing while using the simulation of whatever amp you like
- it is a really good recording interface (via USB) with ASIO/midi etc.
2). It has some minor flaws which I would like you to be aware of:
- the quality of effects is not even:
- time-based effects (reverbs, delays, vibratos, choruses etc.) are simply superb;
- amp simulations - are really great - but require lots of effort to sound right - they just don't work like real tube amps which tend to sound ok at all the settings. These simulated amps CAN sound great - provided you found the settings which suit your guitar, pickups and playstyle. And believe me there are a lot of settings that can be set wrong.
- noise gate - it' simply is there - but it's really nothing sophisticated or special
- looper - it's there but the buffer is really short
- overdrives/distortions - I still prefer the real counterparts. Maybe I still did not find the correct settings? For me they do not sound ok - they do not clean up as they should and the tone/texture is simply is not there
- you really cannot use a standard power source from your pedalboard - you have to use the one provided with the unit - it is a 3000mA source. Not a big problem, but adds some mess to your pedalboard.
- you have to be good at word puzzles to use this one - due to copyright issues - example? What is "$$ for nada" preset?
Dire Straits - Money for Nothing :-) What is "2/3 beards"? - ZZ Top
Sometimes you will guess sometimes you will not - but this does not make the life easier.