The CTS kit was updated a few years (?) ago so it no longer requires a DV relocation. Having those gouges and needing to clock the turbo are certainly annoyances that I wouldn't expect to deal with purchasing a "kit". That said, my CTS K04 was all good.
I know they don't have the best reputation but they were the cheapest and the hardware was fine. I don't expect to ever have to interact with the company.
It was quite a few years ago that i went cts, good to hear they fixed that issue. I went with them for the same reason, hardware was fine and it was the cheapest. Even with the extra issues, I dont regret buying from them at all.