Hi - my two 'pennorth, for what its worth...
I only started with genealogy in November 04. I thought GR would be a good place to build my tree for free, and wasn't immediately interested in contacting others. Eventually I realised that there were quite a few common surnames / places and dates of birth and I bit the bullet and paid my subscription. It was well worth it. I think the site is a bit cumbersome at times, but I have managed to further about six of my lines through GR, including one which unearthered 13 siblings of a ggg grandfather that I knew nothing about (he died young and appeared on only the 1861 and 1871 censuses, away from home).
So, good value - but the mesaging system they use is abysmal.
As for Rootschat - its in a different league! This is a place for interesting discussionand debate, and its members seem to have a genuine interest in helping others, which is rare in this day and age. I wouldn't have been able to get so far without the patience and help of people here.
I've got just about as far back with all lines as I can with census data, and I guess will shortly have to start looking at parish records - and I just know Rootschatters will be able to give me tips and guiance on his.
So, both sites have their value - but for different things!
Paul