I used g-diapers during my baby's first several months. I thought they were ok when he was really little. They started leaking as he got older. We used disposable for when we were out of the house, and then eventually at night because the g-diapers would leak, and then finally we switched for good when he was maybe six months old or so (I can't really remember).
As for the flushing, I never did that - I made my husband do it (heh). I don't think he had any problems. We would collect a few in the diaper pail and then do a batch of them all at once. We don't have great toilets, but he said he was usually able to flush two at a time.
I don't know about the prices where you are, but I found it was cheaper to buy g-diapers at Whole Foods than from the g-diaper web site. If you buy four (I think), you should be able to get a volume discount.
If you have any specific questions, let me know and I'll try to remember. Good luck!