Great product JD
At the risk of giving away one of our secrets I have a couple of pots of DSX on the bench, have been using it for a few months and genuinely feel it makes a difference. It certainly does not make things any worse! Favourite uses include moving/contact area before re-assembling under-levers that have been worked on and rifle bolts and we have some regular customers who give ongoing feedback and have commented on how things feel smoother to cycle when they come back from us.
My other favourite is TW-25B and I used the DSX followed by a light wipe of the TW-25B for several months on a couple of my rifles which seems like a very good combination.