Swym Back in Stock Alerts

I'm puzzled over the many great reviews this app has received. This app was a headache from start to finish. The setup wasn't too smooth either, it didn't update changes I made and really wasn't intuitive. Ridiculously expensive for any valuable features, I couldn't even disable the email send outs on the 15 USD Starter plan. Support was slow, left me hanging for more than a week after which I noticed that they never helped with my issue.
It probably does what it promises on the Pro plan, but if I knew that the real cost would be 50USD a month I would have never touched it.