I really brought this boxset just to complete my collection. If you haven't yet got into Slider I would suggest getting seasons 1/2 as these were the best and is very cheap to buy from amazon currently.
Season 5 only has one of the original cast - the crying man - Remmy and Quinn Mallory is played by a completely different actor. So for this season it was heading one way, downwards, it is the worst season of sliders. Still enjoyed it though but the end still lefted alot of unanswer questions...think the producers might have been hoping for another season to be commissioned. Main reason for buying season 5 was hoping for completion of some of the story-lines, mainly those to do with the Kromaggs - this didn't happen really. Always nice to see Maggie Beckett but do prefer Wade Wells (seasons 1 - 3 of sliders)
As this boxset hasn't been released in the UK, I would suggest buying it from amazon.de as your account is still active on the german site. It worked out at costing about 25 pounds which is alot cheaper than third party sellers. The german boxset does have an English soundtrack, it's just the menu's that are all in german but doesn't take long to workout what they all mean. The german boxset also includes making of featurette which was made for the sci-fi channel...Nothing special though.