Seem like a good idea, only think not very sure where you can rent it from.
Other alternative, go to the shop, bring your own memory, and try to shoot as much as possible, only around the shop, but at least you can try all the features
generally, we encourage members to have hands on the camera or lenses before they plunge their hard earned money into it,
that is why we try to arrange for some hands on session on some new gears, but that usually not always possible to let everyone have a try.
for camera bodies, you also can go to camera showroom or camera stores to have a feel of it, if still not enough, can always rent and try it out
but for lenses, best is rent the lens do to some test shoot.
you can read 1000 reviews online, but that won't beat your very own experience of using it the gears.
I would say renting is a good option if you are unsure about buying it...
For instance a brand new camera (body) costs $1000, renting it is like $30-40 for a day. 3~4% of the cost of a new set. It's still better than you buy the new set then to find that you don't like it and have to sell it off at a price much lower in the 2nd hand market (regardless if you used it for only a day or two).
I have never disliked any camera I bought.
To me there will never be a perfect camera and the person is 'flexible' and able to cope with any of the idiosyncrasies of a camera (the camera is just a dead thing).
So for me, online reviews, and some hands on at the store or from fellow CSers during an outing is enough.