Despite utilizing either the Alesis IO Dock2 or the Behringer iStudio with a well built ESP guitar, active pickups and rather expensive cables...the sound quality is always meh. In fact, dare I say has much more feedback and noise processing through it than either Amplitube or Ampkit using the first IKmedia iRig(which was feedback hell$ and the metal expansion packs all sound incredibly muddy no matter how i adjust the "knobs" and effects chain....and i am by no means a novice in this field.
The IAPs are rather expensive, which seems to be a norm with a lot of these guitar apps. However the quality and overall amount of effects makes it a tad more pricey than amplitube. Sure it will not cost the price of a new tube amp, a multi processor amp simulator by Boss but for the quality of the peddles, they are no where near as tonality superior as Ampkit. Sadly though, Ampkit does not support dock interfaces. After dropping some money on this app hoping it would get better after i bought most of the different amps....still sounds bad. Wish i could be refunded on this.