I've been using Line 6 gear for my sound since 2000 I do believe... I'm a POD user right from then - started with a POD 2.x (marvellous!)
I've swung from branch to branch along the way, having chip upgraded the POD 2.x to what became the final firmware version for that original iteration (non-FBV) 2.3 - that was an amazing update too...
PODxt - refinements galore, deeper modelling results... awesome.
PODX3 - more refinements, struck me as a very souped-up XT - also awesome. (Still have that one attached to my repair bench.)
PODhd - WOW! Major developments... more and more refinements and options for routing etc. Exceptional.
I've gigged my HD a bunch - I purchased a second one so that I could keep one 'packed up' in the go bag along with its FBV and expression pedal goodies, AND keep one mounted on a mic stand at the computer.
Of course still have those both - it's my 'yardstick' plus I am not quite to the point of comfort I need to have for gigging;
(I would have purchased a PODhdx had that come out in bean format, which I vastly prefer over the floors (see below), but I think they must have literally run out of room to work in that form factor).
Enter Helix - not a POD, but the next step in the evolution of pro audio devices.
Unreal; not only a whole new quantum leap forward in the depth of modelling accuracy and nuances, but also an audio routing wonder, AND built to by a performance-oriented beast as well.
All of the above are what brought me to Helix - the closest to this kind of access to features by remote was having my Midi-enabled PODs hooked to my Rocktron/Bradshaw unit along with expression pedals...
It's made very much with performance in mind; once we learn the methodology, we're presented with immense amounts of control over the resources it has on tap.
Yes, there are some warts; and doubtless, the L6 crew are busy ironing those out.
The fact that there are expansion possibilities is quite exciting; similarly, the facility to load in IRs is remarkable - I look forward to test-driving some of the 3 Sigma IRs that I've seen demonstrated to such great effect.
I opted for the rack unit; I dislike the idea of having audio paths and power lines coming out to the floor and back, having come to favour keeping everything at the backline except the controller and my expression pedal coupled to that.
So I'm working with the rack plus rack control, with two Mission expression pedals - one toe switch one, one regular.
I guess I'm poking into this thread just to essentially give my shout-out to the good people at Line 6 for delivering a remarkable feat of both hardware and software - I'm enjoying digging into this unit to see what sounds it can give me (and WOW on that...) plus leveraging the performance aspects to do my bidding =] (WOW on that too of course...)