There are multiple MIPS systems. The early ones were like you described, with a distinct feeling of too much plastic. Newer ones (e.g. Integra) are much more seamless. There are also other companies doing different types of rotational tech, like Lazer with an integral foam-based shearing design.
If you have only tried first-gen MIPS, I recommend giving it another shot.
If you have only tried first-gen MIPS, I recommend giving it another shot.