I have gotten it several times over the last few years. My best advice, get the 1 month subscription and then don't get it for a while (talking months, not years).
It has great games on it, but, it also has a lot of trash that you just wont care about and that better games could be taking the place of. The thing is as well, these games have been there forever. I first started using it like 5/6 years ago and a lot of those games from back then are STILL on there. They only add a few games monthly, so, if you just get the month and then don't subscribe for a while, there will at least be a lot more games to choose from. That is how I do it. A large number of the games are also quite old. Like early beginnings of PS3 old. You wont be getting too many newer games at all.
Streaming is azz, no matter how good your internet is. It's choppy and annoying. They have since come out with downloading where you can thankfully download the game so you don't have to suffer streaming, but, not every game offers that and once your subscription is over, you still can't access the games, it will prompt you to get a subscription again to play.