I have this light table for several years and it is not terrible, because the brightness is just okay up there in that the Neon is. But once you get down lower brightness is weakened. So you have to constantly move the drawing to the top of the light table.
(-) Almost unusable on thick paper.
(-) The AC adapter is heavy and cumbersome.
I advise you rather invest in an LED light table, like Huion Touch Light Table A4 adjustable LED - L4S, more uniform light level.