This plug solves one of my biggest complaints about UK Plugs - Their Bulk.
Being someone who travels quite frequently, I seem to spend my life transporting a range of cables and bulky adaptors. The advent of USB charging meant that I could reduce the number of chargers that I needed to carry, and just needed different leads. This plug saves further space (and weight) in my travel bag.
My only flaws for this device
1) It is not sufficiently powerful to charge Tablets (iPad, Kindle Fire HD etc)
2) Hurry up and release a version that I can use to replace the plug on my laptop charger!
Well done for getting this to market - Keep Going!