I've had PSU for about a week, for the 360. Unfortunately, you don't get a free 30-day trial with this one. So, it's immediately $59 for the game and $9.99 for the first month.
I'm not really impressed with the game. It's not like PSO 1 and 2, or even blue burst. It gets pretty laggy at times, and I've also had a lot of problems connecting, with the interuppt request error, that disconnects from the server and you can't click on the "retry" button to re-connect. So, you have to disconnet it and then go through all the logon screens again, and back to xbox live. It has done this some times 20 mins straight until I could connect.
I've also notices that it usually sends you to a server that's pretty much empty, even when there is still space on the bigger servers for people to connect. So, you have to go to the cube to change universes to get on one that actually has more than 1 or 2 people.
I like the way photon art skills are leveled up. Instead of having to find each one either in the shops or by finding it in a mission, which was some times hard to do in PSO1 and 2, you just level it up by using it.
There are larger teams on this one, which can have up to 6 players. The voice team communications are buggy and we could never get the team chat to work properly, only one on one chat was working. So, if you plan on playing, you better have a usb keyboard ready.
The world is larger, but they make it seem smaller, because instead of using a central lobby in the game, for players to gather, they have many lobbies throughout the game. This splits up people. Some times, it feels like you're the only one in the game because of this.
There is a new shooting mode. I suppose this was made because some people did not like the auto target locking on normal mode. So, it's kind of like sniper mode in battlefield 1942. You can't move your character while in the shooting mode. Classic mode is also available, by holding the right top button while using X for attack. Using 2 handed rifles and such, you have a normal attack with X.
Landscapes and normal enemies just aren't that impressive. However, the enemies are pretty awesome.
Overall, this game just hasn't impressed me much at all.