Eh, I really like The Tenant.
I was also kind of blown away by Brosnan's performance; he managed to pull off that aloof, but credible political attitude of arrogance. Normally when actors try to mimic a politician, it just comes off as ridiculously satirical and/or over the top.
Tom Wilkinson manages to steal the movie, in my opinion - but Ewan McGregor does his thing and is a total pro. I was a little saddened by Eli Wallach's cameo. He just looks horrible, I thought he was going to keel over on camera.
But the cinematography was just awesome, and what a fantastic script. They way it builds up to that fantastic ending, just - wow. This is the best script Polanski has handled in decades. Just great shit.