As far as sales concerned, on par with other vendors....Now, warranty returns- that's another matter entirely.
Sent the hardware back for warranty (Zcom initially told me the drive wasn't covered- which wasn't the case). Zcom's "testing" regime must consist of taking the hardware out of the packaging, slapping a sticker on it, then sending it back out. I say this because trying to use the drive in any circumstance shows at least one fault (the drive tray refusing to stay open long enough to insert a disc) of the three it developed.
After contacting Zcom about the drive being in the same faulty condition as it was when I sent it back (including a short video clip showing the non-functionality), Zcom have decided to cease contact.
If you value your hardware's warranty, I'd avoid Zcom like the plague.
Will update the post once I upload the video showing the faults the hardware has, and initiate a legal action against Zcom.