Just got mine today. Couple of things.
There is at least a small amount of tone suck in bypass. Lost a touch of highs and seemed to get a little lower midrange bump, which might be a loss of a little bit of the lows. This was with a PBass with a GZR pickup. It was pretty minimal, but there. Not a deal breaker, I doubt youd notice it in a mix.
I like the -1 in vintage mode a lot. It's definitely digital, although it's hard to tell until you get below D on the A string. Sounds enough like an OC-2 to me, plenty fat.
The +1 definitely sounds muted compared to my old MicroPOG, which I unfortunately don't have anymore, and definitely has some kind of envelope going on in front of it. It sounds good integrated with the direct and -1, but it's not something I'd use solo, and I used the +1 on my MicroPOG pretty regularly soloed. I'd probably just dial in a little bit to kind of give some upper harmonic content to the overall sound. IMO this is NOT a POG killer. The octave down on the OC-5 in vintage sounds MUCH better than the POG, the upper IMO kind of lacks in comparison. It might have been nice to have the current +1 sound in vintage mode, as it does integrate well with the -1 sound, and then have something more in the realm of the MicroPog for Poly mode.
I really didn't much of a chance to check into Poly mode, which really isn't of much interest to me anyway, but will probably do so another time.
Overall, I'm keeping it as it's pretty useful just as an octave down and the price was right, and I stupidly sold off all of my octave pedals earlier this year.