I wanted to pass along my experience with Enterprise...and it was NOT good.
We rented in Glasgow and planned to return in Edinburgh, which was fine. We selected the tire coverage in case we got flat tires, which we did.
We got 2 flat tires in the highlands, in the middle of nowhere, on a Saturday afternoon. No one at Enterprise answered their phones - not the emergency # to call, Glasgow, Inverness, Aberdeen locations - nobody answered. After an hour of 4 people calling we did the SOS. Eventually, a police officer came and called a tow truck, which eventually came. After about 4 hours, the tow truck driver arrived, he wasn't expecting people. He did drop off in a town on his way to the garage, which I guess they're not supposed to do. So we were in a small town in the middle of nowhere on a Saturday evening of the Highland Games, no hotel reservations there, nothing. We did eventually end up finding a hotel and took a cab from this town to Inverness the next morning (~2 hours/one way).
I asked Enterprise to reimburse us for our actual expenses (hotel, cab, food) as soon as we got back from our trip. They responded once, then nothing. I eventually refuted a charge on my credit card to offset our expenses, which they disputed and it eventually came back onto my card. After not getting responses again, I added the CEO to the emails and they did finally start responded. After weeks of wishy-washy responses and them being focused on making sure that all their charges were indeed paid, they declined my request for reimbursement.
Both the police officer and tow truck driver commented on the fact that Enterprise is fine, as long as nothing goes wrong. As soon as something goes wrong, you're basically SOL. This was so true.
My recommendation is to avoid Enterprise, at least in Scotland, at all costs.