I have used and sold literally hundreds of sets of Scat rods with very, very few issues of any sort.
I think a set or two had issues when the build/engine was eventually upgraded in power and application to a point where the originally specified parts would not have been appropriate any longer. More cam, more compression, more RPM but leaving the original street racer type bottom end.
That noted, I have had a few sets of customer supplied Eagle rods and they seem to have done just fine.
The Molnar stuff looks very, very nice for the money, and the lighter weight saves some Mallory in balancing - offsetting the extra cost a bit. I should be using these in more kits but simply have not made the change yet.