I've had good luck with my hamilton springs, pushrods, and cam. I dont turn high rpms but they've been in my truck for 40,000 miles and 3 years. I've never used maxspool products so I don't have an opinion on those
part of the problem is dealing with multiple personality disorders, you can never be sure which personality will show up, or when they will change to another. for example imagine discussing details of camshaft with a parts man and without notice they assume the personality of a female porn starLOL
Who ever springs and rods I get I will more than likely get a cam from them too. Right now I'm completely open to both companies. I've heard great things about hamiltons customer service and I like that