Ultimate Choice has been decently stocked for the locations I have been to but National still does seem to have a wider selection. I've seen Mid/Full size SUV's and Infinty's at PC selection UC in Seattle, San Diego, Fort Lauderdale. I have read that other locations have had limited choices so Hertz may have some catching up to do still.

Hertz has always been good to me as PC when asking for a certain model within reason at the gold desk, or one of the agents floating around the parking lot. I've never had to ask for a certain model with National as their Executive Aisle is always nicely stocked!