Hi
Can anyone tell me what the drop is on the illumina kit, and what do
you think of it?

Thanks

1.5 in the front and 1.3 in the rear

Actually, I got a bit more than that. Between 1.6 and 1.7". The rear dropped a bit more than the front, leaving ride height dead even front to back on my 5 spd GXE.
I'm very happy with performance, comfort, and looks. It's been over a month since install, and no noise, sagging or any other problems.