A friend of mine used this anonymous service, to create a new account, and found the whole experience satisfying.
Initially, there was a problem where the account was stuck in pending for ~13 hours, so they contacted @guest123 on the address mentioned on the website and got a very quick response. The issue was promptly resolve, the account was created and everyone was happy.
What's best of all is that although the headline figure says 10 STEEM, actually the resulting account was funded with 6 STEEM on creation, so the actual cost is 4 STEEM; which is good value for such a useful service.