I picked up a set of these just after launch. I like them, but they're very much a 'beta' product. You might want to wait.
The biggest issue I've found is a complete inability to render blue. Even shades shown in their own promotional material (and on the box!) are impossible to render, due to the choice of LEDs. I think that poor, especially at the price.
On the plus side, they're easy to install and set up, and it's pretty cool to control lighting from an iPhone/iPad etc.
On the negative side, aside from the colour rendition, the app is pretty clunky. Many features seem to be missing - proper control of rooms, grouping lights, easy set up of pre-set scenes. All obvious features. You can't even remove lamps, and as it auto-adds new lamps I have no clue what would happen if a neighbour also had the same system.
On top of which, the bulbs are only available in what is one of the rarest fitting types in the UK with no word on anything else (so only a handful, if any, of your existing lamps can be fitted out).
It's a good (if expensive) start, but they have a long way to go.