I have the Ikea sliding wardrobe, four 50cm wide carcasses with one mirror sliding door and one white sliding door, and various combos of hanging rails, shelves and drawers inside. I'm delighted with it. My Dad and a friend assembled it, so I can't say how easy or hard it was (although my Dad is very good at DIY). I did however rearrange the interior fittings myself, so that was easy enough.
However I would say not to make a final decision on what kind of doors etc you want until you see them in the room sets in the store, as you may change your mind when you get there and see them in real life. I think they have most of the options on display. Each item on display will have a tag with the item number on it, so you can write them down as you go along. Or you can look at the catalogue online, which will give you a starting idea - [broken link removed]
Two things I would say - (1) the mirrors on the mirrored doors are terrific quality (which I wouldn't have expected for the price), and (2) those frosted glass doors look great in the showroom, but as soon as you put your different coloured clothes inside the wardrobe you can see them all, if not quite clear as day then not exactly tidilyl out of sight out of mind either.