It’s only 150 actual watts at the wall (according to their specs). It’d be enough to grow one medium size plant in a small tent. If that’s all you ever want to do it’ll work.
The problem is, most people decide they want to grow more, and then buy another amazon light, and then another. At some point they realized they’ve bought a few mediocre inefficient lights, when for the same outlay, they could’ve gone with cobs or quantum boards.