I recently booked a car rental and toddler seat with Enterprise for a trip to France with hubby and DS. Upon arrival, we were told that the car was available, but the toddler seat was not, and were instead handed a child booster seat which DS is at least 10 lbs too light for. When we complained, we were told basically that is all there is, take it or leave it. As it was a small regional French airport and that was the only car rental desk open, we had to take the car and I had to drive to the nearest supermarket (hubby is a non driver), to purchase the correct car seat for 138 euros.
I have complained to Enterprise, but have been told that it is in their small print that car seats, even when booked, are still only subject to availability.
This would have been crap enough without the trip being to visit my mum who is in the end stages of ALS.
Bottom line, if you are thinking of booking with Enterprise, book with someone else as it seems child safety is not a huge priority for them.