I've had good results with GSA, but the captcha costs are simply... annoying. Since I mostly use engines that have recaptcha1 or 2 and other types of hard to solve captchas, using GSA CB is kind of limited. I only use it for blog comments.
In-content links, like articles etc require using 2captcha (or other service). I use 2captcha and it's not cheap. It's not really profitable in the end, as opposed to buying articles on PBNs.
So the obvious question to ask (and please Sven don't get mad): is xEvil any good? At least for recaptcha v1. I am not interested in xrumer.
I have installed the xEvil demo and it was absolutely fabulous in solving captchas. On the other hand, if it is such an amazing software, all people should be using it. But it's not like that.
I want to know, if possible, an honest opinion from someone who uses xEvil.
Back to the OP your captcha setup is really important here (how you setup captcha services in SER)?