GSA makes some of the best SEO software on the market and has become one of the most recognized brands among the SEO community. The developer Sven is constantly pushing user requested updates to improve the software on an almost daily basis. GSA also has a very active online forum where users can talk directly with the developer to request features and share strategies. The pricing is very affordable and all software has a free trial so you can try them before you buy. You will not find a better bang for your buck when it comes to GSA software.See positive reviews
GSA SER and GSA SER captcha breaker used to be good. Now, it fails recognizing open source forums like SMF (both GSA SER and the breaker). The developper neglected the engines (the little program that helps recognize a CMS or a forum platform). I saw it because i discovered that in the URL sent to google for scraping website, it used http://www.google.com rather than https://www.google.com. It is now highly inefficient. I noticed the program crawls script platform (example phpbb) and it is unable to understand creating a profile. The developper should focus on the engines to ensure GSA SER finds and create accounts on forums, bookmarking websites... By the way, proxies aren't banned from google because of high number of requests but because of the URL that GSA sends to google which is highly suspicious. That's because Sven , the developer of GSA didn't update the requests sent to Google since many years. About GSA captcha breaker, it fails understanding from where the captcha comes. For instance, I had a captcha from phpbb (basic installation with no modification at all). Captcha breaker understood it was an "unknown captcha" even if it came from a default installation of phpbbSee critical reviews
Indeed we are no scam but a legit company. We exists for almost 15 years now.
Success stories are all over the Internat. But you might just as well ask your detailed questions on the forum: https://forum.gsa-online.de/
We as a company signed up lately on this platform, so sorry for my late reply. We are usually answering support questions and concerns instantly. Though we are located in Germany (as Hannes J. already pointed out) and we might reply with a certain delay due to our sleep ours.