You guys need to realize that most of the cost of operating an inkjet printer is in consumables (mainly ink cartridges).
Sure, getting a free printer is nice, but if you actually use the thing, 2 years from now, you'll realize you dumped a bunch of money into a POS Apollo printer. Yes, it's made by HP, but if it were any good, they would put their own label on it.
No, I don't personally own one, so I'm only going by what others have written.
Also, it's been documented that Apollo rebates take ages to fulfill.
I personally would go with a laser printer if you don't need color prints (higher up-front cost, but per page cost is lower than inkjet), or a mid-range inkjet for around $100ish.
The only situation where I'd recommend a deal like this (pay hard-earned money for a POS and wait eons for a rebate) is if you very rarely print anything, and don't plan on buying many carts, and just want a cheap-ass printer.