I’m sure there was a special offer for these chipex kits on the sellers part of either on this forum or the VWaudi forum a short while ago. You got the big set £38) for the same price as the little set (£30).
I have done a couple of perfect repairs on lacquer deep chips, using model brushes to apply the paint, then 70% IMS and lint free cloths to polish the excess down with the standard touch up pens, but doing a deep chip (lacquer and pigment layer) this way is a bugger to do. Maybe this kit will give better results. The opacity of the TR paint in the touch up pen doesn’t seem as good in the thicknesses required not to give a convex finish to the chip repair, and polishing up is always awkward for me (maybe because I don’t have an orbital polisher) and rely on using MER by hand.