I recently pressed in a set of bearings on my own 94 knuckles. Upon removing the hub on one, the hub shaft de-laminated and I needed a new hub. Hub was around $70 at Autozone (Armistice Blvd), including a new bearing.
PROBLEM:
The bearing they include in the cheapo kits is just that - cheapo. I use Timken bearings, which are around $40-$50 each from memory.
Actually pressing out the bearing will depend on where you take it. Now that I'm set up to do them, I can replace the bearing for $50 each with the knuckle already removed. Turnaround can be a couple of days as I have to wait for press time to open up at the shop, or stay after hours.