I'll also give my 2 cents on Proxy since I've been using it a bit. I've done about 60-70 or so clones so far ranging from amp+cab clones (most of them this way), amp-only clones, and pedals.
First - Proxy is on par with everything else on the market that I've used extensively, which is Tonex v2, QC v2, Kemper v2, and NAMM - granted, I have the least experience with NAMM. I've done a bunch of NAMM captures, but I rarely play NAMM captures in any meaningful context apart from just making them.
The amps I've captured so far:
- '63 Fender Bassman
- '67 Fender Vibrolux
- '64 Vox AC30 Top Boost
- '94 Matchless C30
- Matchless Cheiftain
- Marshall Super 100
- Vox AC30/6 Top Boost
- Dr. Z Z Wreck
- Mesa Boogie Dual Rec ('95)
The low to mid gain amps - everything except the Dual Rec - are pretty much perfect. I've tested every way I know how, and I can almost never hear a difference between the clone and the amp (or the same capture done on QC or TONEX). They all just sound/feel like the amp. In the video we did, there is a section where I go through the cloning process, and then show an A/B. The A/B goes quick - mostly because our videos are always way, way too long and I didn't want to spend more time there - but IMO they sound exactly the same.
The Dual Rec wasn't exactly like the amp - this is where I think Line 6 will work to improve the training. It was very close, but seemed to lack some aggression and high end. Adjusting the Pre Gain and high EQ controls on the Clone got it pretty dang close to the amp, though. Using the clones we made of that amp in presets was really, really good. So the high gain stuff is great - just doesn't seem to be as 100% accurate as low to mid gain amps.
The process is really easy and straightforward. Very similar to Quad Cortex v2. You have to wait for the clone to upload, train, and then download before you can use stadium - the unit is locked while this happens. The entire process - test signals to clone download took around 7-9 minutes, but with public access to L6's servers I'm not sure how that will go now.
Drive clones are equally great. Clones take about as much DSP as an Agoura amp and IR, including drive clones. So if you're using Amp+Cab clones, replacing an amp/cab block in a preset is sort of 1 to 1. BUT, if you have a DSP heavy preset and want to swap out a couple drive blocks for drive clones, you won't have the DSP to do it unless you clear up the row you're working in.
We make presets/captures for many of the bigger units - Fractal, Line 6, QC, Kemper, Tonex, Headrush, etc. I love all in one units, and my favorite/most used units over the past years have been Helix/Stadium, and Axe-FX III. I use a pedalboard into Tonex/QC often, too, but not as much as the all in one stuff. Proxy has taken Stadium up to a much different level for me. I think I can safely say that it's my all-time favorite unit now, hands down. I'm a unique case because I have access to a lot of different amps that I really want to play captures of, and now I can in a unit that I love to program and use.
Line 6 really did a great job with it. I'm excited to see where they take it in the future. Eric keeps talking about Proxy capturing 'other things', and I really want to know what that means, ha.