While the tabloids made a lot of noise about Milano and Doherty not getting along at all on the set during this season, you'd never know it from their on-screen performances. Both actresses are excellent at portraying loving sisters who will do anything within their extended powers to help the other. Episodes like "Morality Bites" show the sisters working their hardest to change the future that Phoebe has seen in a premonition (her power is to see the future, but she can't control it - it just happens from time to time). Again in "Apocalypse Not," the sisters work to rescue Prue when she's trapped with a demon known as one of the "Four Horsemen Of The Apocalypse." They may have been fighting when the producers yelled cut, but on screen, they really came across as loving sisters.
The bottom line here is that if you are looking for some cerebral programming, you might want to pass on this. However, if you are looking for some fun, somewhat silly entertainment that combines witchcraft, dating, hot women and killer demons from Hell, Charmed is probably a good answer for you. Season Two is the best season of the show in my eyes, and is well worth picking up if you are a fan.