This team should be in charge of future PSOnline games. Unlike the PSP team, these guys sort of get what PSO is all about.
I played the Japanese release to death and highly recommend it to any PSO fan who was disappointed with PSU+offspring.
God knows the game could do with a multitude of improvements (a bit of elevation in the levels wouldn't have hurt for starters), but I think any PSO fan will get at least 50 good hours out of PSZ. That's nothing compared to PSO, but it's still a solid dollar/hour investment.
P.S. Totally agree on the western theme, but when you're playing the game itself it doesn't really show much at all, so give it a chance anyway.