Gaz 4 Good=it’s cheap, small and works well. I’ve got it joined to another 100w one and they work well together. In the photo it has a 61w input but at that time it was cloudy and snowing. On a reasonably sunny day the two together were showing 180w, it’s winter and the sun is low in the sky so more than acceptable.Bad=I opened the box it was in and it was very DIRTY, it had food spilt on it and looked like someone had used it as a plate to eat their meal from. It had one scratch as well but I decided that as it worked well I wouldn’t return it. I’ve never opened a brand new product and found it so filthy. Apart from that I’d have given 5 starts, because of that I gave 4 starts.