I was in the closed beta before they charged you to play. It worked great for me but I have to 50Mb connection connected with a LAN cable.
Nice... now that it's in open beta, we can talk about it. I had just about the same experience as you. Although, I thought the experience was pretty poor on the PS3. It wasn't so much an issue with the streaming, but the interface -- it's so darn slow! Sony
really needs to realize that the PS3 is slow as molasses when it comes to anything but the XMB and to
stop making stuff so grandiose! The PS Store takes 20+ seconds to load and PS Now is even worse!
Now, on the PS4, it works great. I played that zombie game... I think it was Kill All Zombies or something like that, and I was able to use navigate through hordes of zombies coming at me from all directions without any issues. That just tells me that I wasn't really suffering from any poor lag that made the twitchy, twin-stick shooter game unplayable.
There was one difference though... back then, it was all free to play. There's no way in hell I'd pay their prices to play those old games! D: