Only on our second Motability car, but have had extended test drives in many others while choosing.
When choosing and ordering our previous Audi Q3, we were treated like royalty by the Audi dealer, a very pleasant premium experience.
With the Volvo, again the Motability saleswoman did everything to ensure the model we test drove was the correct engine/trim level. Even though she had left by the time handover day came, her replacement was friendly and helpful.
We only had a slightly negative experience at one Peugeot dealer where the Motability salesman told us that discounts on the AP were illegal and frowned upon by Motability! When challenged on this he dug himself in deeper by saying Mrs 72 dudes could loose her PIP award if he offered a discount. We just laughed it off as him being a cockwomble!
I do wonder whether some Motability customers on here take the trouble to act professionally by calling ahead to make an appointment to see the correct person.
Nevertheless, there is no excuse for rudeness and unprofessionalism as described above, but I have found that bad car salesmen/women are in the minority.