Background:
I am aware of this SO question about Transactional NTFS (TxF) and this article describing how to use it, but I am looking for <
I suppose "real-world, enterprise-grade" experience is more subjective than it sounds.
Windows Update uses TXF. So it is being used quite heavily in terms of frequency. Now, it isn't doing any multi-node work and it isn't going through DTC or anything fancy like that, but it is using TXF to manipulate file state. It coordinates these changes with changes to the registry (TXR). Does that count?
A colleague of mine presented this talk to SNIA, which is pretty frank about a lot of the work around TXF and might shed a little more light. If you're thinking of using TXF, it's worth a read.