With e-gold, the costs are high to get in and out (ie. to buy and sell your gold -- something like 3 to 5%), but moving it around is quite cheap, easy and safe.
The key advantage IMO is safety. The companies that deal in it are larger and have been around longer than Neteller in most cases.
Be careful not to say too many negative things about it or Phaedrus will eat you for lunch like a hungry doberman.
We had a little debate about this one a few months back...
moving money around thread
For me Neteller is solid enough and I love their debit card, so I'm sticking to that. Offering an additional option can't hurt, though I suppose.