Feel like I'll get flamed for saying it but I use this service and I think it's good. I don't see the privacy concern. If you look at the privacy policy they state that they essentially do not use your browsing activity for anything other than ensuring the vpn is working. They also open source their client application. Anyone can say they're evil and they lie or whatever but in my country and many others the statements they've made about how this works and the data they use mean something.
I'm iffy about giving more days to Google, but I use their VPN when I'm on any kind of questionable WiFi. I'd rather give the data to Google than to whatever random place is getting it from my hotels or whatever.
I also have a VPN server setup at home, but generally routing everything through home is too slow (for now, I might be getting significantly increased upload speed soon).
I think most people in this thread are missing the point of this service. This is 100% a valid option when traveling and needing to protect yourself while using public wifi. This exists to protect yourself from identity theft and fraud.
I agree, even if they are harvesting that data I'd honestly rather it was Google than a thousand little companies that barely anyone even knows exist and can get away with more illegal action.