"Your experiences with the tool are similar to mine."
"I picked up some impact universal joints to get it in some spots where it won't go straight on. I just have to be careful with them to keep the angle as straight as possible for safety."
I have those, too, but I find the HF wobble socket extension set (1/2" set of 3 or 4 lengths), which is inexpensive, works well with the worry of over doing an angle with the universals. Take a look when you're at HF.
I have had caliper carrier brackets and caliper mounting bolts that were really tight (from the factory) and wouldn't come out with an ordinary breaker bar. Sometimes I can't get a good swing (limited space) with a longer breaker bar, even with the wheels turned.
If the HF electric impact wrench won't turn them, I let that HF electric impact wrench rattle away on those puppies for a while in stages (letting it cool) and eventually they break loose. Be sure the wrench is set on "reverse," of course. I don't use mine much, but it is definitely worth having on hand.
Mine works fine for lugs, but I usually don't break it out for those. However, it has gotten me out of a bind with other fasteners after hand tools won't cut it.
It reminds me of my old Honda motorcycle days of corroded thread Phillips (or cross ?) screws all over the engine, that were impossible without a hand/hammer impact screw-driver. Once out I'd replace them with socket head screws.