I bought a Size Genetics a few years ago, it was a fairly complete package with a special saving which came to about $160. If you look at what is advertised on their site it corresponds basically to their top package “Ultimate System” advertised at $499 on special for $299.
If I was to buy today I would probably buy the comfort package $399 on special for $249.
What would be important would be a quality extender and a good selection of elongation bars of different sizes so that you can choose the best one for your size. I used some of the comfort accessories in the beginning, but for quite some time now I have wrapped the penis using 2” cotton gauze roll which I cover with a 2” cohesive medical bandage wrap (elastic) with some light foam in between.
I don’t necessarily advocate size genetics over other quality brands (like x4 labs), and I have not tried cheaper ones, but mine is solid and I have never had issues with parts or breakage even with the extensive use.