I'm generally happy with the service I've received, but I can't comment on the investment performance as I've only had my ISA for 6 months. I did have some teething issues with my initial investment, for some reason this was not automatically added to my account and I had to chase it up. Then subsequently after the cash finally appeared in my account it did not get invested for a couple of weeks until I chased it up again. My main criticism of the service is the process for adding funds to the account. There is no direct debit or card payment facility, so you have to manually transfer money or set up a a standing order. Then it takes several days for funds to appear in the account even though bank transfers usually take less than 2 hours nowadays. Also as noted above the mechanism for associating incoming funds with the correct customers' account seems to be flaky.