I think it depends on what you want to use it for.
I have an ott light and love it. It is a desk size and I can use it behind my sewing machine when piecing, or can put it on an end table to provide good light when I'm doing hand work. I cannot use it when i am free motion quilting because it gets in the way and I've knocked it off the table a couple times.
I also have and Ecolux LED light that I have stuck right onto the sewing machine that I use for free motion quilting. It gives off absolutely georgeous light. This one however is only good for sewing on the machine.
Aileen