I typically replace my tent stakes with MSR Groundhogs straight away. I find those are the toughest choices available for the rocky/hard Colorado soil I camp on.
I received a set of these with a recent tent, though, and as they looked better than the average stock stakes, I decided to keep them. I'm glad I did - they're just a bit smaller (just 2 ridges instead of the 3 on the Groundhogs) and lighter than the Groundhogs, but they're nearly as strong.
If you need the best of the best, go with the Groundhogs. Otherwise, these are a very solid choice.