Hmm.....
You never know until you try one. My Sherline rotary table has 5 minutes of backlash.
So at 1" from the center the backlash is equal to 1/2 the thickness of a hair on your head.
Now it all depends a little on what your trying to do. Linear to angular conversion :
1 minute = .0003" per inch or .0009" in 3"
1 arc sec= .000005" per inch
So 10 arc sec= .00005" backlash at 1" distance Or if you had a piece out at 3" that's .00015" at 3" distance.
I don't think your machine can machine to that.
So there is backlash and there is position. Now do you think for $99 you are going to get backlash equal to that?
Then you can also ask what is the positioning accuracy you are after?
Being practical about it all, the table may be perfectly fine for what you want to do.
Now i do have a positioning rotary table, that position wise, it's repeatable to 3 arc seconds. And if you bought it new it would be around $5000. That's not too much better than 10 arc seconds. Then of course, how would the average joe measureing it to find out!
Just some things for you to think about,
RICH