It pogo's. But not bad and I'll explain.
Some people that have riden in the car do not feel the
pogo - because they do not know what to 'feel'. However, I can feel it.
Here's a comparison: Whats worse in pogo - old stock struts and springs (75K) or this setup with Prog springs and KYB (25K) ? In my experience, the stock setup bounced like Tiger (Pooh). My stock setup was dangerously BAD at 75K (I've since replaced with NEW stock setup - great ride minus the 4x4 looks.)
To directly answer your question:
It pogo's a little. When you hit a big bump, it will bounce twice compared to bouncing once on a NEW stock setup.
I have NOT tried the 'pogo retainer fix'. From what I have been reading, these retainers fix the pogo effect on aftermarket spring setups.
J.E.T.
'97 Red GTP