I've only used them on softwoods so can't comment on how well they work on hardwoods. I've had no trouble with softwoods, but router bits are only as good as the router they're used on. So if your router doesn't have enough power these bits could burn you out, but that's true for all bits.
Universal tool set 151 items 1/2" -1/4" BG151-1214
28 Review
Enhance Woodworking Precision with Roundover Milling Rounding Edge Forming Tool
11 Review
High-Performance Whiteside Router Bits UD2102 Compression for Precise Woodworking
10 Review
Wi-Fi router Keenetic Extra (KN-1713), white/grey
19 Review