I bought a mini micro for dd at 4 and ds at almost 2. They are seriously awesome! I baulked at the price too, but my kids scoot everyday inside and out and it is something they can both do together. If I'd known how awesome they were I might have seriously considered the adjustable one at $180, but for us the basic one has been brilliant!

The company are great too. We lost the handle to one (long story) so they sent me another one for a $40 which I though was reasonable.