Th extension is very flexible and customizable either in terms of functionality either in terms of design. Its use is not straightforward, but is not to complex either.
At the beginning a small bug was detected, but the support was fast, friendly and efficient and the problem was solved. Everything is working to perfection now.
The extension is frequently updated and there seems to be a real care by their developers in providing a good product.
I would advise this extension either buy its functionality either by its support.
My experience level with Joomla its reasonable.