Wish you had asked about these before buying one. They are not well built. The heatsinks are very thin and barely adequate for the job, hence running three fans for such a small unit. These units run on the ragged edge of thermal reliability and if your ambient temperature gets to high or a fan goes out or they start to plug up from dust you can easily overheat the LEDs reducing their output and shortening their useful life.
Also, the driver circuitry is not very good AFIK. I believe these are voltage driven rather then current driven which is a less reliable (but probably cheaper) method of doing the job but can also make these prone to early failure.
But I guess they are inexpensive
I wouldn't compare these to Maxspect. The Maxspect are much much much better then these.