I've got the OEM hard plastic liner and while I like that it's hard plastic in case of spills, the surface is slippery as hell. I've got a small tire pump, my snow brush, and a battery jumper that audibly slide back and forth while taking turns. Wish I could fit them in the spare tire well but...
As I'm about to buy Honda Care's extended warranty, I see that they offer a Maintenance Program which doesn't seem too bad price wise because if I buy it with the extended warranty I get $200 off.
I got a similar maintenance program for my last car (Audi S4) and it was definitely worth it, but...