These lights seem well made and I like the fact they blend in well with my bike during the day due to their compact size and design. At night they do a great job of making cars aware of me. (I use them in flash mode) They do not light the road up ahead, but then I didn't get them for that. So far they have survived gale force winds and rain...as did I just about.
I like:small and light weight.
I don't like as much:will not light the road up ahead.