The grinder is well made (China) and works well. I'm a retired machinist and well versed on machine use, so with that said. The manual does not give instructions on how to use it and Bradley referred me to You Tube for a customers video, WOW! This man had no clue, no safety or knowledge on how to set it up or use it correctly.
Bradley does not have their own video. If you check out the competition's compony video you will get what you need to set up and operate this grinder correctly and safely.
After that I got it set up and working, I sharpened 3 set of 48" JD tractor blades, did a good job, 2 sets of 60" JD blades that where beat to crap, took a bit of time but I did save them.
Tip:
Have a balancer, measure in from the blade end to where edge stops try to keep them the same length (this will aid in the balancing)
Keep a bucket of water to cool the blade as you grind, never let it change color from heat, this will soften the edge and will not stay sharp.
Never sharpen to a sharp edge, keep about 1/32 blunt edge.
Never grind the end or back of the blade (only if it's nicked or burred)
Most blades are about 30 degrees.
**The debris (dirt) catcher also includes an adaptor for wavy type mulching blades (comes with S100 kit) also shown in competitors video (how to use it).
All in All it is worth it.
It's also a bit less cash out of pocket then competitors.

Review update
I my review of S110 kit, I also added the angle grind support. This speeds the set up by 75%
It is a very useful add on, I recommend it.
Replace the standard support, drop the wheel to 1/8" from it when it's set to the angle and grind.
Most blades are 30 degrees but it's a quick adjustment to change it.
Very nice