I've got several Valom kits in the stash, although none built as yet. People I know that have built them say they are good for short run kits. They have engraved panel lines and the fit is generally good for what they are. They contain some resin parts for engines etc. The kits tend not to have locating pins, so aligning things like the fueslage and wings you need to take care with.
Because they tend to do subjects that others probably wont do as injection kits they tend to be the only choice, but are well worth doing, they are much better than Mach 2 kits. I will certainly be getting the Brigand and others when they are available.
Cheers
Clive