I have some personal thoughts about pillowballs:
Pillowballs are indeed great for handling. However, they have 2 big problems:
1. Most aftermarket bearings are really low quality. This is because hard-duty grade spherical bearings are hella expensive. I was thinking of upgrading some average ones on my WRX, and the bearings alone are like $150 each. Low grade bearings wear out under load, and start getting very sloppy (and can sometimes fail).
Keep in mind I've seen the Tein ones personally, and the bearings they use are sh*tty.
2. Bearings (by design) have no play, and are extremely harsh on a street car. You will get no isolation at all from NVH. It helps if you have high quality dampers (by high quality I mean in the $2k range), but you will feel every bump and jolt in the road. Your struts are now directly coupled to the frame, with no compliance.
Due to #2 I think they are a poor choice for a street car. However, you younger guys have newer spines than me.

I'm not the kind that likes to have a racing suspension anymore, because the harshness kills my kidneys.