If a vendor tells you they are THE exclusive provider of their service at a venue...RUN! It speaks volumes when you have NO choices. There IS a difference between exclusive and preferred.
Just two pieces of advice-
Do your homework, or better yet, have your planner do his/her homework.
Ask to see samples or photos of their products and/or services
Seen below: Beautiful solid wood constructed benches. Designed, built and exclusively...(ha ha ha just checking to see if you are paying attention)...offered by Hawaii Island Events. No really, only we have em.