From everything I've read "fit" and "comfort" are key factors in things like BCs and regs. As I check out this equipment in my LDS, I'm trying BCs on over my street clothes and am unconfortable sticking regs into my mouth of the shelf ("did the family just in here before me do the same thing?!" 
It seems getting wet is the only way to accurately gauge if it's worth purchasing.
So what's the acceptable rule of thumb here? Should a LDS let you try equip you're interested in? Do only the "good ones"? If the LDS doesn't have a pool attached to the store, do most let you rent or borrow new equipment? For how long?
If stores do not do this, there's not much advantage over an online store...but I want to support the LDS where I've taken classes and am building a relationship.
I'd appreciate any insights to a newly certified diver. thanks!
bill

It seems getting wet is the only way to accurately gauge if it's worth purchasing.
So what's the acceptable rule of thumb here? Should a LDS let you try equip you're interested in? Do only the "good ones"? If the LDS doesn't have a pool attached to the store, do most let you rent or borrow new equipment? For how long?
If stores do not do this, there's not much advantage over an online store...but I want to support the LDS where I've taken classes and am building a relationship.
I'd appreciate any insights to a newly certified diver. thanks!
bill