I bought mice from RodentPro at a show once and they looked as if they'd died of starvation and they caused loose stools in my snakes.
The ones I just got from MiceDirect were the ones pictured on my "Scary Mice!" thread.
They had scabs, bald spots, weird puncture wounds and were generally poor quality.
I'll never buy from either company again.
I'm going back to the last show we attended to get more of the great quality feeders that sadly, I didn't buy enough of that day.
[I have no idea who they were, sorry]
I've heard good things about Layne Labs, though.