All of what Krytin said and more. My biggest issue is that you pay $600 (for the Single Adjustable ) or $800 (for the Double Adjustable kit), the ask you for measurements for the correct mount dimensions and all you get is this ridiculously thin 2 piece sleeve and some washers to stack on the ends to take up the remaining slop in the lower mount. The sleeve flexes in the middle pinching and cutting into the bushing and it's mounting area.
I bought mine used so the up front cost didn't hurt me so much. If I paid for these new they would have been back in the box and on the truck the next day. Shouldn't have to heavily modify something that cost this much to make it work right when it is supposedly custom designed/setup for your car.
The used ones I bought; the shocks had just been rebuilt, and were basically new shocks. Still regardless of QA1 or Naake rebuilding them recently the lower bushings were chewed all the way through (must have missed this during the rebuild) and grinding on the aluminum body in the mounting eye.
I had to make custom lower mounts that fit the stock mount location properly (without 3 washers stacked on either side), make my own custom upper mount bushings as the kit tries to reuse half the stock mount unsuccessfully (nothing like having your shock nearly free floating at the top

), and am getting ready to install my stock springs in place of the crappy QA1 GBF series springs that come with it. Basically on top of the cost of the suspension setup I spent almost another $200, several (at least 20-30) hours of my own time to make them fit properly (this included taking them in and out a few items), and I'm still not happy with the kit. We'll see once I get the stock springs in place, I have everything ready to go just no time to do it but am fairly sure I'll have the stock setup back on up front within a year.
The QA1 springs bottom out, creak, barely allow room for height adjustment unless you want the car fairly low, and just are not tall enough for our application. I didn't want to lower my car more than 3/4" but have them set all the way up and I'm down almost an 1 1/4" from stock height.
Oh and I almost forgot the QA1 Thrust bearing kit that they recommended for the lower spring perch rusted out within 2 months of install. I live in Florida so there is no salt in the road from snow and I live nowhere near the beach.
Personally if I had to do it all over: Stock or Kyb shocks up front. I would use a Cut coil with either brand of shocks and would only use the Eibachs springs on the KYB shocks (to bouncy on stock shocks).
Now the Naake/QA1 rears they are a winner. Still had to make lower mounts but the rear shocks work great and I love being able to adjust the pressure. Fronts were a great idea but piss poor execution on mounts and springs.