Perfect? no, but very very good none the less. All the features other than the Facebook tile work great (including the weather and 'where am I' plug ins), the Facebook feature doesn't authenticate with my account for some reason......anyone else found this? The devices also seem fall out from time to time but if you leave them alone they soon kiss and make up without any interaction.
Screen is bright, controls are fine, I wear mine as a watch and its light and unobtrusive.
Battery life is OK as long as you don't spend all day on the thing.
Charging port is in a silly place meaning you have to take the device out of the watch strap to charge, but again that's no biggy.
With a device the size of the Streak having the means to interact with it without getting it out of my pocket, bag, back of the sofa is just great.
It will be interesting to see what new plug ins arrive on the Market..........