I've used that set, and I say there pretty damn good and quite accurate. The only thing I could say negative about them, is the little screw valves to adjust the amount of gauge "flutter" basically you have to play with the little valve alot to get all the sync needles so there not moving a huge amount with every vacuum pulse.
8/10 IMHO.
The one I have is better, they use a metal style check valves as restrictors instead of the little plastic needle valve, and it has a nice aluminum case with foam padding. However it was over $200 bones.