3 Months on and the service is still going strong, I've restarted my router once since launch day (amazing) and the speeds are consistently high (superb). The highest speed I've seen is 74mb/s and lowest of 40mb/s
iPhone apps now download lightning fast, I can now watch BBC iPlayer in HD without it skipping, Youtube is now instant in HD and I get constant download speeds of around 3mb/s.
Was it worth it? in a nutshell... Yes!