I think that as metalphreak said, it's not meant to be deceptive but mostly a problem while updating their website.
I ordered a couple designs maybe one or two months ago, before they changed their design, and if I recall correctly, the "free" color option was only for 5x5cm PCBs. I needed some < 5x5 for the first design, and some < 10x10 for a second design, and I remember correctly the colour 10x10 were more expensive than the green ones, whereas the 5x5 were same price (hence "free color"). I ended up ordering black 5x5 and green 10x10.
As for shipping, quality, etc... :
- I originally paid for EMS shipping, but had a change of heart the next day and wanted DHL, so I sent them an email, they were quick to reply, and we worked something out (I paid them the missing 9$ via paypal).
- I know it's not important, but before shipping, they emailed a pic with the PCBs being packed and the receipt. That's a nice touch
- Turnaround was something like a couple weeks shipped, so pretty fast. I had another order that went out exactly the same day but with Seeed, fabrication took 4 to 5 more days.
- I didn't see any problem with the traces or vias (maybe some off-center vias, but nothing too bad). However, the silkscreen is not that good : text moved, have a hard time printing thin lines, stuff like that. I won't complain because of the price, which is pretty damn cheap, and it's great for prototyping.
Attached is the pic they sent before shipping.