I bought one of these deals, from Woot, about a month ago.
Specifically, I bought the "Dual-Core i3 Desktop with 1.5TB HD" a.k.a "HP p6-2355 i3-3220 8GB DDR3 1.5TB".
It's okay, I guess.
Here's some unsolicited advice:
1. Think long and hard before getting any HP computer these days.
Why does Woot have so many "refurbished" machines to unload on us?
I fear that it's because so many people buy them, have trouble with them, and return them.
For example: my computer, and (per other websites) lots of other HP desktops have USB ports in the front-panel that don't work, because the wires from the front panel weren't plugged in to the motherboard. It took me only a few minutes of Googling to find a picture that showed me how to plug in the loose connector. But I was left with this nasty suspicion that HP has outsourced their quality control to the Lighthouse for the Blind.
2. Don't buy any of these HP computers if you plan to upgrade anything right away.
The power supply is, apparently, only barely adequate to run the stuff already inside.
I bought a video graphics board because the on-board graphics didn't support my two monitors which both had VGA interfaces (the on-board graphics does support DVI-D and one DVI-I which supports VGA through an adaptor) but couldn't get the new board to send any signal to any monitors.
If you go the support forum on the HP website, you can read lots of cries for help from people attempting, and failing, to do something similar.
Not only might you need to replace the power supply, you will need to learn how to work around the "Secure Boot" stuff in the BIOS that, in the name of security, tries to prevent changes to either hardware or software.
3. If you can live with the capabilities of one of these systems as-is, without upgrading anything, you'll probably be happy with it. My system was well-packed, had no cosmetic or other defects - except for the unplugged USB ports mentioned before - and is working fine at the moment.
4. If you can live with Windows 7, or even Vista or XP, you can live with Windows 8. I installed the "Classic Shell" - www.classicshell.net - which restored the Start Menu and un-did some of the other silly things in Windows 8. So I bypass all the weird stuff in the "modern interface". And I really appreciate the much faster start-up time in Windows 8.
5. The CPU really is a Core i3-3220. The "specs" tab, listing it as "Core i3-2220", is wrong.
Hope this helps.