Product review (4 stars): good value kit with minor flaws
No complaints, except it was missing the washer for the idler pulley.  However, the original installation didn't have it either; it had the little plastic triangle as do the roller wheels.  So I just reused the old part, since you got no extras with this kit.

The quality for the rollers seemed to match the original, only difference was the color (old ones had red plastic).

The drum belt is the real payoff; the old one did have very small cracks, so I was glad to replace it.  Dryer should be good for another 10 years.

The instructions were pretty useless, in several different languages.  I tossed them and watched the youtube video CGbf4_NtBkY.

Some installers recommended using a lightweight grease so I used a high temperature grease on the shaft, after a thorough cleaning.  Some of the shafts showed minor wear.  The old wheels did have a black greasy residue, so I assume they were lubricated.

I ended up using Red Line 80401 CV-2 grease, which I bought at a local auto parts store.  It is a bit expensive, which is okay if you have other uses for it, and it is good for up to 800 degrees F.  The dryer is going to run between 180 and 225 degrees, so the redline grease should hold up well.