Here's what I usually put in a review:
- where you tried it
- your experience level
- what your specs are, and how you setup the board
- take it through various terrain and comment on each (ice, packed powder, powder, park, trees, chutes, etc. whatever is available)
Try to be as objective as possible. Sometimes with a great board it's hard not to gush over it, but no board is perfect, they all have compromises somewhere.
Hope that helps...