I love this synth / sampler / sonic playground. SoundFactory is probably the most fun and inspiring synth I have used. Sound quality and what sounds 'good' can be just personal taste but of the many synths I have owned over the years it is easily on a par with the best of them.
When people say certain hardware has a bit of extra magic or mojo I just think this has that too.
The beauty for me is you can go deep exploring but also you can just throw together strange combinations of sound generators and fx and modulate them and get interesting results.
The layout can seem daunting at first with pop out menus and so many options but it is actually pretty easy to learn and also there is a lot of help boxes so you can get info on what the controls do and learn things as you go along. It is brilliantly well thought out overall.
I hope Soundfactory does really well - it is its own thing, and some people may be put off by the extra menus or layout etc but I just love the workflow now.. basically it is always inspiring, fun to use and just sounds very good - also you have a huge amount of top quality but pretty crazy FX to modulate and play with.
There is also all the drum side of Soundfactory which looks really impressive too but I haven't even got to that yet so lots to explore still.
It has been a great buy for me so far and I can 100% recommend it.