I don't know what's your purpose on getting pbt keycaps, but the pbt, while changing the tying experience, had a smaller effect than changing the profile and thickness of the keycap.
I went from normal oem keycaps (thin abs oem profile) to think pbt cherry profile (vortex ones) and the biggest change in the feel came from the profile and thickness. I also like the feeling of pbt, but it has a much less dramatic impact than changing profile and thickness.