For what it's worth, at my agency we have worked with several different review "management" systems. Recently we switched from the one that we had been using for the past year or more to GetFiveStars.
I like GetFiveStars a lot. It's simpler to use than some of the others.
One of the main motivating factors in our decision to leave our prior system and move to GFS was support. The support at our prior vendor started out great and then slowly attenuated over time to being just ok.
Then, not too long ago, the vendor's support function shut down entirely for three or four days while the company took all the staff to some offsite meeting. Yes, that's correct: their support department went completely non-responsive, "radio silent" for three or four days.
That happened right when we ran into an awkward situation with one of our clients that we could not solve without support. Ugh.
So, my point in this long diatribe is to recommend that you factor support, both type of communication and hours of operation, into your buying decision for review management systems.
As they say, "your mileage may vary".