More questions about mounting

[irrka]

Let me preface by saying i've never put anything on a mount ever. So...
I know that wood and cork mounts look pretty and all and are a super-healthy way to grow orchids but i'm concerned i wouldn't be able to water them every day, and it wouldn't be humid enough around here, especially in the cold months with heat on.
I was wondering if anyone had tried using those foam slabs that people stick flowers in for mounts and how that has worked out?
this was the first link i found on google with a picture of what i mean: Oasis Floral Foam WET FOAM Bricks (48 Bricks) for $42.72 For Fresh Flowers /Green