Cartridge alignment tool

Tonearms OK, but almost impossible in many turntables .I have a Feickert , one of most common decent arms are Pro-Jects 9cc variants , very difficult .Of the 100+ TT's  I've owned over the last 50's the easiest to do is the
Pioneer TXL-1000 current production than has a large  pin sticking up
on top of pivot . With this you can get dead on a fine-line or shibata that makes this cheap TT, if 700$ is cheap, sing better that many more expensive ones .

I've tried a few and Fiekert is my fav.  Very confident in my setups with this and is the easiest.   I can see and align cantilever better than any mirrored gage I've ever tried.

I've used CartAlign, Dennison protractor, GeoDisc. I am currently using CartAlign. 
Any alignment tool used is better than no alignment tool used.

Re: Using the Mint.....When I got mine, he recommended and I got a 50mm Magnifier. #7501.    I would say this is nearly a necessity to get things right.   Without the magnifier, I was just a bit off the radius, with the magnifier, spot on with no effort.

I have and use the Uni-Pro- I like it a lot. I also setup tables as a service so it makes sense for me imo. I am sure the Feickert is fine too.

+1 that the whole process of dialing in your cart is way more than the basic alignment