I purchased a pair of Racers from the outlets for $70 last December with the pure intention of running in them, especially for the price. I just couldn't stand how they felt, so I sold them ASAP. I guess once you've been running in Lunarlite (now Lunarlon) for a few years, your feet become spoiled. Any thing over $100 for the Racers is just a robbery, IMHO. If you want to use the Racers for performance, I'd definitely look at the Lunaracer3, which are a fraction of the price and feel so much better. The Trainers, on the other hand, I can stomach. Again, I understand we all have our preferences.
completely agree with the lunars. i've been using lunarglide 3s to run in and love it. tried running in racers once, but agree with vader and others, they're pretty unstable to me, personally, as i don't always run on the balls of my feet.