Love the tone of these strings, and have used them based on tone... but they have manufactiring issues, completely unacceptable at these prices.
I use Thomastic strings on blues acoustic and jazz guitars, violins and mandolins and reccomend them to customers (I've run a luthiery for close to 40 years)... BUT these Medium mandolin strings are flawed. I have a vintage F Gibson and an F Loar for pub sessions. Both have carefully maintained ailpieces with no sharp edges that could cause damage. I have now had 2 G string failures at the loop. This never happened until the latest batches...
Choose them for tone, certainly, but beware... they are not currently as well-made and robust as they used to be.