Is anyone else having problems using multiplayer?

1. On trying to open multiplayer I'm told it's not available - Try again
later.

2. On finally connecting once I enter a game, I get as far as the list of
players but nothing else happens. I have to start again.

3. I do this and only a few people are in the game, this eventually
whittles down to zero and I'm presented with a message telling me "more
players are needed". OK, I start again.

4. When I eventually get past the list the game hangs on "Loading..." but
nothing else happens. This time I need to restart the entire game, which
takes a few minutes.

5. Finally the game starts. I run for a weapon, then suddenly "Connection
to one or players lost - Returning to single player".

6. One time I start playing the Cops and Crooks game where I'm supposed to
chase the bad guys. I'm driving the car, I start driving looking for where
the bad guys are. Only the orange blip is in fact, following me! Confused I
stop the car and find that all of the cops are shown as crooks on the
radar. But shown as cops on the main view.

Is it me or is multiplayer as buggy as hell?