Those lights are ok I don't see any reason to hate on it except for nothing said about the lens angles and that bullshit "Equal to MH/HPS 1,300 to 1,500 watt light". No 350w LED panel (thats how much power actually goes into LEDs on that panel you linked) is going to grow as well as 3-5x as much wattage in HID (they claim watt for watt their LED panel grows 3.71x - 4.28x better than HID and thats bullshit because the best LED panels might get 1.5x better at best and are usually about the same as HID).
I recommend you look up IrishBoy and SettingSun grows if you are interested in other brands of LED. Be weary of any company that claims their LEDs produce 370-428% more watt for watt than HID. If you are replacing a 400w HID replace it with 400w of LED, or maybe as little as 250-300w if its from a great company.