I purchased subscriptions to this plugin for websites I have been building for my clients and am pleased with it. But I must warn any potential purchasers of the many hidden extras you will need. Add-ons are to be expected, but there are multiple features added-on to these add-ons.
When I raised my concerns, the customer support I received was sarcastic, condescending and inaccurate. We have lost money on the project I was working on, and when I brought this to their attention was told I should have read the small print. This firm covers their back and mocks those who they have caused trouble. They obviously have enough money and do not care about the individuals paying them.
So in essence, the features NOT included on specific add-ons are not made clear until you need them, and then another purchase and yearly subscription is required. A great, great pity.