I've had mixed experiences with American steel. I have:

1. a 6/8 robeston cutlery co. roundpoint with a fairly heavy grind
2. a 4/8 robeson nubak roundpoint
3. a 6/8 geneva spike that is very hollow but has a very heavy spine.
4. a 5/8 green lizard (or salamander - it's the model with a lizard embossed that doesn't say green lizard on it but the model is GL something)
5. a 5/8 round point christenson Brockton razor

The robesons hold an edge great and give a nice stiff smooth shave. Very hard steel. I have a very hard time honing the RCC model, but that's probably a function of the light smile, heavier grind and very hard steel. But when I get it right it's wonderful and holds the edge. The nubak is easy peasy to hone and shave with, but a tad boring at 4/8.

The Geneva spike takes a great edge but that spike is a monster. And it had a ding on the point part of the spine that makes it strop unfriendly, but I think I've fixed that with some sanding. But it's a stiff little guy and shaves real nice, so I'd like to get a square or round point one sometime.

The cattaraugus I just can't get right. It gives a good enough shave that if I shave in the morning I can get through the day unembarrassed, but not a good shave. Can't figure out why I can't hone this right.

The Brockton is interesting - it feels really smooth, almost swedish steel smooth, but I haven't gotten it really sharp yet.

I find solingen razors are the best for me - they almost all take an easy edge and shave smooth and close. But I do think the US steel is harder.