...They do awesome work, have some of the best customer service and always fix there issues....
+1 on their customer service. I've only called them twice but both times they were super cool & VERY helpful. They definitely went above & beyond what I was even expecting when I called.
First call: was regarding caster/camber adjustments to get my alignment closer to spec. The alignment shop I took it to didn't do anything but adjust the tie rods so I figured I'd do as much of the "alignment tuning" myself then take it back to the alignment shop for final adjustments and readings. Called SPC for some quick tips & they literally walked me through the entire process to get my caster/camber adjusted. They also helped me fix the tire rub on the rear wheel well issue that I was having & I wasn't even calling about that. The tire rub was something I mentioned briefly & they were nice enough to help me with that. The tip was if I adjust the caster/star plate to a more negative caster setting (moving from their recommended "D" setting to E, F, & so forth) it would move my wheel away from the rear wheel well. The trade off would be less caster. When I had my caster/star plate set at their most negative setting "G", I still had ~1.5-1.7 caster (no tire rub on rear wheel well). I currently have it set on "E" which changed my caster to ~2.5-2.7 (still no tire rub on rear wheel well but now that I have 1.5" wheel spacers I have a slight rub but thats a spacer issue). They even told me to have the alignment shop call them so they could walk them through the alignment process using the LR UCA. I didn't actually have the alignment shop call SPC but wow, that was a cool offer regardless.
*Side note, on the G & E setting, my steering wheel still self centered after turns and straight line stability was fine but the E setting might feel a little bit more stable but nothing dramatic.
Second call: Check to see if they offered any other spare parts for sale other then what was listed on their site b/c I bent my locking plate when torquing down my top nut. They said they don't sell the locking plate by itself so I asked them if they would be willing to sell it but they ended up shipping it to me for free. I offered a second time to pay especially since this was an error on my part and not a manufacturing flaw & b/c I like supporting good business so that the good ones stay in business & they again said it wasn't necessary...my locking plates arrived 2 days later (i only asked for 1 plate but they sent me 2). Pretty awesome customer service.
Summary of LR UCA: Just my experience & may not generalize to everyone
1. Great customer service. I thought Toytec's customer service was good until I dealt with SPC & they were buy far better.
2. Great adjustability with LR UCA to get my alignment closer to spec in regards to caster & camber, allowed tire clearance from UCA, & allowed tire clearance from rear wheel well. Also want to again state that I do not have any experience with the other aftermarket UCAs & they may have the same capabilities & great customer service.