Well, my experience was that their shit didn't work very well. Lots of DNS leaking despite correct setup, and customer service just shrugged it off. It did work right for a while under linux using the system's network manager to connect to their servers directly, but over time they made it harder and harder to find their sever list by burying it deeper and deeper on their website.
Ultimately, I couldn't use it under windows without using their client, which constantly disconnected itself and left me unprotected. It would just shut itself off. Then they went ahead and helped themselves to my money way ahead of schedule for a renewal I didn't want, and I had to threaten them with a fraud report for several days before they caved and gave my money back.
I wasn't happy with them selling me shit that barely worked and then stealing my money so I'd just stay instead of fighting them for a refund. Reason enough for anyone to avoid them.