Originally Posted by LosAngeles
I would be curious where you were able to rent an SMB Sprinter from...
We rented the Two4theRoad model 144" wheelbase Sprinter from Campervan North America's Las Vegas location for a one-week tour of the Grand Circle route around Grand Canyon, Bryce, Zion, etc. It was well worth the cost to get first hand experience with layouts before purchasing a unit.
Campervan NA has since added more locations and units, but all their campervans are upfitted by Sportsmobile, most of them I believe by SMB Texas. The exact configurations vary a bit as they've acquired newer units so check with them for exact details if you're looking for a specific configuration. For example some early units had marine toilet/black tank plumbing but newer units seem to be provisioned with cassette toilets.
There's a helpful sticky thread titled 'Other Campervans to Rent and Test' over in Member Classifieds subforum. We're currently making arrangements to rent a Safari Condo XL-Flex Sprinter from Durango RV to evaluate our next unit. Definitely seems worth the cost to get a week of hands-on experience.