I just purchased a cheap license for Bitdefender Premium VPN and don't like it. While I make a point of testing VPNs before buying them, in this case I didn't, since it's based on Hotspot Shield which I was using recently and was impressed with. Unfortunately, while they are using Hotspot Shield's servers and technology, they have their own app which is very basic. The app lets you choose a country to connect to, but does not give you a choice of locations within that country. This is a big limitation as quite often I find that certain websites I visit are blocked when connected to some VPN servers and I can sometimes solve this by connecting to a different location in my country. While this is not an option here, I visited a number of sites which sometimes would be blocked without any issues. Still, it's quite possible that some sites I visit would be blocked.
The biggest issue I have is that it is very slow. My internet speed is a lot slower when connected. If there was the option to choose what location to connect to, then most likely I would be able to find a server in my country that provides faster speeds, since I was getting decent speeds with Hotspot Shield itself.
Having said all of that, I'm sure that it works well for some people, just not me.