The London Eye is a huge slow moving ferris wheel ...

The London Eye is a huge slow moving ferris wheel that gives you a great view of London. That said it is over priced and I can say I wouldn't pay for it twice without a good reason. I think it should be literally half the price it is. Dont get me wrong it is nice and you get a great view. You are on it for the right amount of time as well. They should have something on the capsule/car that shows you what you are seeing. But of course they are trying to get you to pay for a guide book.

If you are in London and only going to likely be there once it is probably something you could still do as long as you have the money for it. Just keep in mind that it's a bit of a waste of money that could be spent elsewhere.