Is that set fully sculpted? I've read that it's either partially sculpted or all R3. There's only one set that I would buy that's all R3 (Rebel ofc). If I'm not mistaken that set is produced on the regular, I know there was a group buy (2012) but I've seen that set sell out (USA/ANSI) quite often via keyboardco.com.
Well now I'm not sure they're fully sculpted... I'd say maybe partially, I'm remembering that when I started using them I felt the keys on the top rows were lower than the original Filco OEMs. I have that keyboard in the office, and I'm not going there until next week, I'll check and report then.
If you're interested, I found a couple of reviews:
When I read the second one now I recalled the slippery feeling of the key tops when I first tried them. I got used to it now.
Overall, I think they're interesting at least. They were a big change for me. I don't regret byuing them, even they're expensive, because of the experience. But I'm not sure I would recommend them, and I can't compare them to anything. (But again, I haven't tried any SA, or many other keycaps yet.)