So, I was thinking about getting the full version, thought I'd try the trial. They cleverly gate the distortion effect (sort of a big part of a guitar app) behind having to register for an account. I did. I went and checked their privacy settings and so on, made sure I wasn't signed up for any lists, and got my pedal. Then I got a promotional mailing from them. Sure, technically spam since I didn't sign up for it, but whatever, I'll just unsubscribe. Then I got another one a bit later. So... No, I'm not buying the full version, or buying any pedals from them. I am not okay with the "we will put you on a mailing list and not honor your unsubscribe" thing. Mailing lists need to be opt-in.
Sound's okay, I guess. The big win of AmpliTubeCS is the tuner. I guess if you wanted all the specialized pedals and stuff, this would be pretty nice, but also quite expensive. (Not, mind you, compared to actual music hardware, but compared to competing apps.)
But yes, I really would rate a product lower because I don't enjoy dealing with the company. Their model is that you have to have an account with them to get pedals, and pedals cost money, so if you want to use AmpliTubeCS, you're committing to a relationship with the company, and at that point, their bad mailing list management and support issues become a downside for AmpliTubeCS as a whole.