I agree, this is very usefull extension, on some servers and some condition. On free hosting servers there is no way to force this extension to work. And suport for other extension is uncomplete. Forums are overloaded with asking for help for this extension. I made 12 sites, and they working more than exelent, afret instalig of sh400SEF, they been crushed, at least they did not worked well. But, who I´m I to judge, I´m just simple and small joomla user!