I was wondering are they any good???
Yes
That answers the question, right? 
They are good, but can be loud, and may sometimes cause vibe/wobble
Yep,
Ok thx thats all I needed to know.
Yes - they are good.
Like Samad said they can cause a wobble/vibe. Somtimes the string will get inside the stack(what ever it’s called) and will get a knot in there. The knots are hard to get out. Like Samad said again they are VERY loud.
~Steven
They rock! They’re sooo good, that when you wanna take them off, you wont take them off! that they are fun! But the only thing you can do thats impressive with them is 5a, not 1a tricks. And they cause quite little wobble, but they lower your sleep times.