Yeh, they look good on the desktop, but then they are £10 for the iPad one and £100 for the mac one - thats what put me off! I have tried the helix native 15 day trial, if only it was 15 days of playing rather than calendar days. It is really impressive though (its what made me realise I needed the HX instead of the stomp). Probably easier if you buy it with the LT as it is a cheap deal.
I looked around for reviews on the amp but couldn't find anything, has yours been published?
Seems like it would be brilliant with the one caviat of redundant software compatible hardware, like the old iphone effects pedals etc.
But just the whole amp designer with the 'change this valve, oh that is a bit brighter' bit is certainly worth the entrance fee.
I am surprised they haven't done a similar thing with the effects though - so what happens if I change the opamp in my overdrive from a TL084 to a LM741 or run the powersupply slightly cold?