I'll try to put this in the simplist way possible!
DOMAIN
The domain is absolutely terrible! http://forums.xisto.com/no_longer_exists/ this is rubbish! You need to register a domain.
WEB BUILDER
The web builder is easy to use but does have limited functionality. Sure you can create a form in a pretty easy way but it takes a while and dosen't have any preset fields like countries! You have to type in over 200 countries to make a simple contact form or something! I would say for a little personal website very easy to use!
ADVERTISEMENT
They display a huge toolbar acroos the top of the page and on the footer it says get your own website like this!
FINAL DECISION
It does have an easy to use website builder but it has limited functionality. It has undiscreet adverts which does let it down. The domain is terrible which can also let it down. All in all I'd say that for a personal website for just your mates 6/10 and for someone that wants to create something a bit bigger 2/10!
Please post any comments or criticism!