Since switching over my collection to F/T (out of necessity due to no local live suppliers within 70 miles of Charlotte, NC), I've tried The Mouse Factory and Rodent Pro.
Rodent Pro's "Inventory Reduction Sale" yielded some attractive prices but overall I was less than impressed with the product. They arrived frozen solid with no problems, despite being shipped 2 day fedex in the height of the summer. The rats are not vacuum sealed and many have already started to show signs of freezer burn after just a week in my freezer. The non-vacuum sealed bags also do not lend themselves to compact storage, so right now a large portion of my freezer is occupied by bags of rats. The rats, when thawed, are clean for the most part, with the exception of a few pieces of frozen feces that made it through into the bags.
I think there's some leverage when it comes to cleanliness, as live rodents make a much larger mess in the tubs, especially if the snake doesn't get to it right away. I guess I expect frozen rodents to be more sterile than what you get from RodentPro.
The rats themselves all seem healthy and meaty, so no complaints there.
Compared to The Mouse Factory (vacuum sealed, immaculate), I'm torn between which supplier is "better." The mouse factory is almost twice as expensive, but the true test will be how the RodentPro rats fare over time in the freezer. If I end up having to throw away a number of them, it might offset the savings.
Just thought I'd share - and see if anyone else has had similar experiences.