Unicomp keyboards feel like a piece of junk. A 10$ logitech is better built and has less defects. IBM Models M are much better. However, buckling springs aren't the more confortable mechanism for writing. They are hard to press, noisy, inconsistent and old-fashioned. No matter if they are old or new, I don't think they can be considered pleasurable to type on, at least for me, that I'm more and more fond of linear switches everyday. On the contrary, they are one of the best switches from the typing performance point of view. As regard IBM Model Ms, also consider that they are very large keyboards, that they look vintage and that they lack modern goodies such as the extra keys, the usb connection and the nkro.