It's like a security blanket: we are all forever safe in the knowledge that Friends will be around til the day we die, despite it's final 10th season, it'll be re-run and watched over and over again, much like Cheers.
Season 7 is probably not the best series of the lot, but it is by no means disappointing, with the central storyline being the run-up to Chandler and Monica's wedding. There's crazy-Monica galore as she obssesses over every tiny detail and goes to extremes to get the wedding of her dreams (watch The One With The Cheap Wedding Dress, hilarious!), Chandler wrestles with his past and finally confronts it (Kathleen Turner is outstanding as "Mr" Bing) and the rest of the Friends pitch in anyway they can: Ross shows us his musical side - not with the keyboards, but with bagpipes in The One With Joey's New Brain - Joey becomes ordained as a minister, whilst Phoebe and Rachel fight for the position of Maid of Honour.
Aside from the wedding, guest star Eddie Cahill (from CSI) provides a new love interest for Rachel as her younger assistant, Tag. Denise Richards' charms allure the guys (and one girl!) in The One With Ross and Monica's Cousin and the Friends come to terms with the fact that 30-something is impending and wave goodbye to their 20s.
There are some episodes that have a distinct 'filler' feel to them, like The One With All the Cheesecakes, which is why I only awarded 4 stars as previous seasons have been outstanding with every episode delivering, but it's still pretty damn good and worth the purchase.