I just ordered a Steel City 4 wheel, eight speed, 1 hp power feeder for my table saw. Amazon had a very good price on it, $729.00 - including shipping. It is hard to beat the convenience that a power feeder bring to any sawing operation. It feeds the work at an even pace, keeping it tight against the fence, as well as reducing burn marks that can occur when you don't feed the stock at an even rate or when you pause feeding the stock. I have always been impressed with the quality of the cuts that saws with power feeders produce.
Then there is the safety issue. Power feeders keep you away from the blade. If set up properly, they pretty much block you from contacting the blade. The risk of the dreaded kick-back when using a power feeder is for all intents and purposes - zero.
If I set the mount judiciously on my 5hp table saw, I can use the feeder for both the saw and the router that is mounted to an extension table. By simply buying another base, I can move the feeder to my shaper or even my band saw. For the money I think that a power stock feeder is a good investment in ease and quality of work with a significant emphasis on safety too.