I'm sure Tiffer will post cos he is the Head of the Eggy fan club, but I'll say my peice anyway.
Eggs are good, I had a z-boarded eggy one and never complained about it's speed, reliability, or the fact it can hol about a squillion paintballs. Oh and the fact it is virtually weather proof and I still keep it for wet weather balling.
However,
Free feeding off a marker you may be able to get it feed 15bps+ with fresh batteries. On the marker with batteries which are not straight out of the box it's another thing.
On advice I bought a pulse. Lot of money, but the fact that you can slide the tray out for easy cleaning and you can pulse chip it if you want sold it to me, as well of course the potential for higher feed rates. I put this on my marker and without adjusting any settings on the marker tested out a hopper of paint. I have to say it was almost as if I had changed the marker, it felt like a completely different beasty. The flow of paint was faster and more consistent.
So ok, egg's may be able to feed 15bps+ but they do it with a few fits and starts as they do it lowering your bps. Buying a better loader will give you more consistent paint flow.
However, you need to work out for yourself whether you can justify the difference in cost to the difference in performance.
And for the record, Eggy's are indeed good escpecially for the money you can get them for now, they just arent as great as the other loaders that may have been mentioned here.
So... make up your own mind about what you want.
I havent had a chop with mine since I had it 7 months ago, though if taking my advice bear in mind I put the RI bolt in it the day I got it.