I think the best sounding one is the bass amp modeller. It really adds some natural sounding bass tones and beefs up a recording that is nice and usable in a home recording. The ability to moe the mic placements in all of them is a great feature and nicely alters the sound. Compared to the Axe FX II or the Kemper, these aren't the best, but then the Axe FX II costs around ?2300 so, this isn't in the same league! The guitar modelling isn't top of the line, but many people seem happy with it, you have to trust your ears, they really do sound good though, they don't generally have that harsh 'fizzy' quality that a lot of amp sims do (with perhaps the white amp being the exception). The vintage amp room has some really nice effects such as tremolo and vibrato that sound groovy. Softube plugins are fantastic in general and I use a lot of them, they are some of the best out there.