Quality of cams --- Summit?

Just wondering about what your experiences are on camshaft/lifter kits that will see lots of miles throughout the year (and years to come). I've ran the MP cams without issue for years in cars. This is a two-part question:
1). New cam vs. Re-ground cams. Are the Comp cams, Crane cams, Summit cams etc. etc. new or do some regrind? And do the re-grinds last as long as new?? I've never had a cam reground......
2). Looking at the Summit cams, are they in for the long haul?? Or, is it true, you get what you pay for.... 117.00 vs 200.00 +

REAL life experiences are preferred over opinions.... :D