I checked the prices on Amazon Prime for OTC and Harbor Freight for their brand.
OTC Ball Joint kit and adapters = $194.23.
HF price for their kit and adapters = 159.98.
HF usually has a 20% coupon available in the mail or online, bringing the HF setup down to $127.98. (HINT)...HF only gives the 20% discount on one item. I buy one item, go out and put it in my truck and then go back inside and buy the second item. I get the digital coupons and the catalog coupons, so for me, I get enough discount coupons to get the discount on several items. I only do this on big ticket items. I wouldn't do it if I was buying two screwdrivers.
Looking at the reviews, the HF kit should do the job without any issues. With the current Covid-19 shutdowns, I'd probably go with the OTC from Amazon and simply have the kit delivered. I have prime, so the shipping should be free.
If I needed anything else from HF, I might get their setup. I like walking around the store and picking up items that might be handy plus get whatever free goody that they're offering at that time.
If I was a professional mechanic that did suspension work, no question,I'd buy the OTC kit. Since I'm a hobby mechanic that might only use the kit twice or three times in the rest of my life, the price of the HF kit is pretty attractive.
Good Luck, L.M.