Endlink -

Fitment - same as stock; no big deal in installation. 30min job.
Quality - SOLID. Compared to the stock set in terms of flexibility by sticking 2 screw drivers through the holes and flexing the link, the movement seems to be coming from the rubber bushing mostly on the stock link. There is significiantly less (~65% less) flexing on the Rev-labs.
Tips - bought teflon washers from the Depot and placed them where the swaybar touches the end-link to prevent noise issue. No noise.
Driveability - The rear does feel even more solid, along with my already existing rear 22mm swaybar. Don't know if there would be a big difference if only the end-links are installed.

HKS Type 0 with Harness -

Installation instruction - whatever came with the purchase was not so clear. I obtain most of the knowledge from reading I-club's posts.
Operations/functions - instruction for the T/T is written in Japanese, can't make out anything of it. Figured out how to use the set-time countdown function, and auto function, that's about it. Need help in using the rest of the functions. What is "WR"??
Installation location - left of cup holder above radio. Used the Dremel tool, slowly go at it little bit at a time for cutting the hole.