Pros
If you prefer to work at home, do not need a reliable source of income, and are okay with assembly-line intellectual work, then this should be a good position for you
Cons
It is odd to see people say that they can set their own hours on this job. You need to submit your hours about a month in advance with the understanding that the more you make yourself available, the more likely you are to receive hours. ETS, on the other hand, can cancel an 8-hour shift the day before and is only obligated to pay you for 1/2 of the time. Too, there is no guarantee that you will receive anything like 40 hours per week during the peak season - even if you are regularly acknowledged as having high productivity with a high degree of accuracy. Further, if you don't pass calibration, which sometimes happens, then you only get paid for the time when you tried to calibrate. Thus, you will only receive one hour of pay instead of, say, the 8 hours you were expecting. Too, $13-15 per hour may look good for some, but you need to bear in mind that the position requires a high skill level and is part-time, temporary, and comes with zero benefits. The pay does not compensate for these disadvantages. The bottom line is that positions like these tie up hours that could be given to yet another employer who is offering contingent employment and then fail to adequately compensate you for making those hours available. If you're just looking for some mad money, then all of this should be okay with you. If you need a real job with meaningful, fair pay, it would be wise to look elsewhere.