Well, this episode isn't actually 'bad', but it's not very good for Friends's standards, but I guess this was season 1.
Monica's storyline was the worst. It was a creative and intelligent plot, and gave Monica a bit of character development, but seriously, who would discover that someone has stolen their credit card and decide to take tap-dancing lessons with them? The tap-dancing class was the funniest part of the girls' storyline though.
Joey's storyline was fairly funny. The names were good, and him not knowing who Stallin was almost like seeing the season 5-10 Joey, which is only a good thing of course.
Ross's storyline was also funny at one or two parts. His farewell to his monkey was done relatively well and I thought the animal-circus guy was very funny.
Overall, I think only 60% of the episode is worth watching, so I've given it a '6'.