I ended up with a compact once when I had reserved an intermediate, and I wasn't very happy with it, and that was just DD and myself, no other adults, strollers, etd. This was through National, don't remember what the car was. On the other hand, my BIL has rented compacts at Dollar- I believe it was a Neon- and there seemed to be enough space. What is the price difference between compact and midsize? When I'm travelling, ms costs $3/week more than compact, so we grabbed the ms and also have a coupon for an upgrade. Even if it's $20 more for the week, I think the ms is worth it.