I have two sets and they have server me well, (Grizzly H5677) I have just opened the 2nd set because I got the 1/2" and the 5/8" ,7/8" bits to hot in the 1st set.
Pushing to hard and to fast in oak..
I also have the big set from 2 1/4" to 3 1/8 " and it's also a great set,it's coated but no big deal on the coating for me.
They do make better sets BUT for the price it's hard to beat the Grizzly set
You will see the same set all over the Net eBay,NH,HF,WC, and I think they are all made by one company...just the box maybe diff. with one latch or maybe two on the box.
I did have a titanium coated set and still do somewhere in the shop but I didn't see a big.diff. with the coated ones over the plain HSS.
Just my 2 cents on Forstner Bits
Just a Note **** I use the sets I have to make wooden knobs, for jigs for the most part, block of hardwood and drill 5 holes. 7/8" dia. and cut it out with a hole saw and insert a tee nut and I have the right size knob I need.
Plastic ones are not cheap now days and I can make 10 at one time and stock up on the blanks knobs.
If you want to see how to make the knobs just ask and I will post a snapshot or two...