I've got two sets..work fine for me...did a buddies 512 4000 lb car with a 4 speed a few years ago and it's still going strong..of course these cars are so loud I couldn't hear if there is any gear wine at speeds.. but the mesh pattern was good when assembled so .....
I have used them several times with great success. They all have been easy to get a good pattern on both sides of the tooth, and all have been quiet as a church mouse. Wish I could say that for some of the richmonds I've put in.
I haven't used Motive specifically, but they bought Richmond and I've been using their stuff. My differential guy, who does excellent work, uses Motive products quite a bit.
I have a set of their A/FX gears in my 9"..4.57's..they are set up and ready...havent run them yet...my diff guy says they are good gears..he set mine up to run on the street..