Yes, benfotiamine works really well. I take 150mg a day.
I use Doctor's Best.

In the "old" days, (before Neurontin) Thiamine was a common treatment for PN in the elderly. And it works, by enhancing some metabolic actions to help heal. (Neurontin does not).

So it was dropped in US in favor of the Neurontin which was being pushed by drug reps.

Meanwhile, in Europe, Benfotiamine was being investigated in Germany for diabetic PN. This form stays in the body a bit longer than thiamine which seems to appear in the urine (its odor an easy marker to notice) within hours of taking. The very first benfotiamine therefore came from Germany. And we used to have a poster, on our previous board home before we moved to here, who used it. He used to post about it. Back in late 1990's. Sadly to say he passed away from cancer in the mid 2000's, but he used to email me etc. He said it cost alot of money and hassle to import, to even purchase. (Over $60 for just a month's supply).

Now it is very affordable. I get my Doctor's Best from Amazon at a huge discount.

Start at least at 300mg a day, but after a while once you are primed up and your enzymes saturated, I think 150mg a day is a maintenance possibility over time.