I have used the service, and I would say it is just what you would expect. The records come back very thoroughly cleaned, although in some cases that does not mean they are perfect.
Without my requesting it, PVF also dewarped several of my records that needed it.
Turnaround time is about 2-3 weeks. Records come back as clean as you could get them with an ultrasonic cleaner on your own. Packaging is very carefully done. Everything comes back in new, high-quality sleeves.