I have an update as well. My eBay Protune Suspension kit arrived a couple weeks ago. I didn't have quite the same experience as Rshustler1. My kit came with no instructions or link to instructions (as many eBay Feedbacks stated, actually their feedback on these kits is horrible, but I took a shot anyway). As I posted earlier, I knew they used Rough Country (RC) instructions, but for sport I asked the eBay seller for a link, and they also sent me the same link to the RC installation instructions as I got from Protune from a request off their website.
To be clear for anyone thinking this is a RC kit; it is not. I specifically asked the eBay seller if these were RC parts, and they directly responded, "Hi, It is our own brand, the instruction guide is the exact same way to install. It is not a rough country product. Thanks."
Visually, the Protune parts did not match the pictures of the RC fabricated parts identically, their design and manufacturing are not identical, these are not direct clone parts. Dimensionally, I checked a lot of "critical attributes" (I'm an engineer in a nuclear facility, so I'm used to doing that when I perform what we call "receipt inspection"). Dimensionally all the parts matched each other well and were what I expected, and the workmanship was fine, just how they went about making the parts did not match the RC pictures. That's not a big deal.
FYI, I sent RC a website contact asking them if they knew Protune Suspension was using their instructions, I never got a response, FWIW.
My problem was with the included hardware. I was installing the kit myself (I am very mechanically inclined). First step was to verify the included parts were correct and adequate. I had to use the RC bill of material, and the included hardware I received did NOT match up. There were several fastener discrepancies (different lengths, missing bolts, different sizes, metric not SAE as the RC BOM called out, etc.). I sent a complete list of the missing (and extra) parts to the eBay seller.
The eBay seller was very responsive with communication throughout the entire process, I'll give them that. They asked for pictures of the parts I received, and took about 2 days to respond to what I sent, stating "Thank you for your pictures. Base on your pictures, you have received the correct full lift kit for your order. We ship out some extra part just in case you need it."
I thought about it, and decided for me, this was too sketchy at this point to take my car apart with parts I KNEW did not match the instructions I was working to, and then find out I couldn't complete the installation. That's not how I go about critical projects in my World. I requested to return the kit. The seller was very responsive, they paid the return shipping and sent a Fedex label, and they refunded me in adequate time after they received the return.
In the end, no harm no foul. The seller was very responsive. It does suck they are effectively stealing RC's work using their instructions, but at the same time RC didn't seem too concerned about it, at least that's my assumption since they didn't bother to respond to me for letting them know. These Covid days though everyone is having tough times with communications.
It was a shot worth taking at $189 and wasn't that much of a hassle for me. Honestly, I don't need the lift on my DoJ, and have plenty of projects, so it wasn't that important to me in the end. The little bit of uncertainty just swayed me to bail on the project.
I'm not necessarily recommending you don't go with this kit, especially since Rshustler1 had a positive experience with having a shop install his kit. The supplied parts I received may very well have worked out for me, and at the worst I'm sure a trip to the hardware store would have easily provided the missing fasteners. I'm just letting y'all know my experience so if you are interested in the Protune kit, you can be knowledgeable and decide for yourself.