Great value for money
I've contacted support before purchasing, while I was on trial because I found a small bug and they dealt with it swiftly! So, customer support 5/5!
The app is quite intuitive, and if you have any experience with similar systems, you'll be able to put a guide on your site within minutes. Everything is completely customizable, and you'll be able to match it to your brand. Grab two deals if you don't want the "powered by" text. There are enough options to make things work even for more complicated onboarding procedures, so I doubt you'll run into any limitations soon.
Like any other SaaS, this is a kind of service that's paid monthly and not as a one-time fee, so you're getting a great deal. To make things even better bear in mind, you're not limited to any number of domains. So as long as you're within the monthly user limit, you can deploy it on as many projects as you like.
For all those coders among you - yes, obviously you can "code this in 5 minutes" and not pay anything to anybody. But please, be realistic. This is a one time $100 or $200 cost. Is your time that worthless? I think not. So don't kid yourself with the "5min" illusion.