Originally Posted by
ijgordon
Well, if you rent, say, 11 times per year, and get upgraded to a fancy Prestige car, say 3 times (on 2-day rentals), that could very well cover the $250. Whether that's actually of value is a personal question. Some people are perfectly happy with a Taurus.
Based on the anecdotal evidence I've seen here on Flyertalk, you shouldn't expect upgrade percentages anything like that (Prestige on 3 out of 11 rentals).