Funny isn't it! I usually find that if there are going to be problems, its with after-sales. The sales team are more likely to be wonderful to get you in the door, then after that they don't care.
However, I will never get to try the after sales because the 2 sales people I dealt with were such utter w**kers. Barry (who I later found out is supposed to be in charge) I found to be an arrogant, ignorant tw*t, and some young lad who was in the car when we took one for a test drive was totally clueless. I asked if he knew how the car behaved on less than perfect surfaces (because he only wanted us to drive on a dual carriage way), and if it suffered much from torque steer. I wouldn't mind if he had just said he didn't know what that was and left it at that, but he said he didn't know then proceeded to tell me I was totally wrong when I explained it to him.
Left a deposit on a car that was due in (i.e. deposit was to get first refusal for when we saw it because we wanted a red one, but this one was silver). It was under the express agreement that it was refundable for whatever reason. Barry phoned me every day (the car wasn't eve in) chasing me for a decision, so in the end I just said give me my deposit back and forget it - I'd wait for a red one (which I then bought from Frost's). He made excuses for over a week as to why he couldn't refund the £250 back to my card before I went and stood in the show room and wouldn't leave until he sorted it (which took him nearly 30 minutes of pi$$ing about). Complete and utter morons.