We have three different sprinter units that our 24hr crews use. One is made by road rescue, and the other two by wheeled coach.
The Road Rescue has a ton of leg room up front, and it's great for long trips if you're driving or riding shotgun. The Wheeled Coach however is terrible. If you're a taller person you'll find your knees almost touching the dash. You have to make a choice, either you have a little bit of seat recline and your knees are crunched up, or you sit straight up and get a little leg room.
The rear on both is pretty standard for a type II. It's workable, but its cramped if you have more then 2 people back there. I've done a lot of long distance transfers with a vent, IV pumps, and the LP12. Once you get it all situated it's not that bad. On the other hand if you have to bounce around from the side of the patient to the head of the patient it can be a bit of an acrobatic act. I don't mind working in them, but I do miss the medium duty rigs we had in Maryland.
Driving them is hit or miss as well. Our units have a single rear wheel, which was a terrible mistake. With a dual rear wheel I think they would be a lot more stable then they are. Driving in snow is a challenge, the older Road Rescue will shut off the motor if the wheels start to spin. The newer wheeled coaches seem to have phased this out. They do very well on long distance trips as far as ride and fuel economy is concerned. The only down side is the wind. If you catch a good cross wind it will blow the rig almost into the other lane. The rig is basically a giant sail.
I'm not to involved with the maintenance the trucks have had. I do know the other truck has around 150,000 and has been through 3 transmissions. The 2 newer trucks only have 50,000 on them, but we're concerned we may be replacing them later. We seem to be filling the Diesel Exhaust Fluid (DEF) quite a bit lately. This is a feature that's been added on to the newer trucks. Once the vehicle runs out of DEF it will not allow the vehicle to start. One of our crews found this out the hard way about 150 miles from base.
I would like to see my company use them as long distance haulers. Utilizing type IIIs for our 911 areas in town. However I don't see this happening any time soon.