As far as quality goes I can't say for sure how good they are.
I have learned a lot about brakes over the years. If your using the stock caliper, then the stock M/C was a 14mm bore size. This worked but not as good as it could.
I have found that going to a smaller bore size improves braking power and lever feel.
A lot of those Chinese M/C's have a 12.7 mm bore size which is a good improvement in braking.
I have been looking for a set like those pictured but with the reservoir as part of the body, not up on a stem like that one. Looks a bit cleaner on the bars.
I have a dual disc set up and want the 12.7 bore size for that. One about 11 mm bore would be better for a single disc.
I want one of those two.
One thing I like about Yamaha M/C's is the adjustable levers. A lot of the cheap M/C's use a lever set up like Honda and no adjustment.
The kits that have adjustable levers on both the M/C and clutch are something I might like.
Leo