I bought the slalom not long after they first came out. After a lot of research involving taking cleaners off display in shops and walking them round the shop floor I opted for the slalom. Not as noisy & heavy as a Dyson and after a few runs easier to use than a dyson.
A number of years down the line and my slalom is done, but it has had a hard life. It has cleared up the debris of a house extension, not as much as a stutter when faced with plaster dust, small bit of rubble and the day we had a soot fall from the fireplace. Has kept up with the mess of growing kids and all they could throw at it. But like everything there are a few cons. The main con is until you get used to how it moves, it does feel heavy on your wrist. Other cons are the extending hose nozel feels a bit flimsy, although I've not managed to break it yet. The collection bin is not as large as the dyson, but easier to empty, therefore it's not a chore to empty. The pro's now! The extra long cable means I can vacuum most of the down stairs of the house from a central plug in the hall. The extra long hose and attachments make doing high bits and stairs easy. It does goes from doing carpet to hard floors without drawing breath. The beater on/off button is really useful and a function I use alot. It also copes with clearing the car out, and as a horse owner, the hair get everywhere, but the slalom deals with it. Some people have said it doesn't cope with some pet hair. I disagree, but have found it struggles a bit with the nylon carpets in the car. I put it down to the carpet and not the cleaner.
The time has come to replace my trusty Slalom, and without hesitation I'm going for another Slalom.