Instruct: Classify Amazon reviews into positive or negative sentiment
Query: very bright and good field of view

For a tiny little thing, it's bright and visible from all but the front. Pitch black out and I biked down to the end of the block, and cut back and forth on the crossing street. My wife could see me the whole way down no problem, and could see me unmistakably when I passed the end of the street a couple of times. Not as bright as a motorcycle's taillight but still obvious.Also note: It DOES come with a couple of seat-post connectors and a clip that goes on either (I had bought a bike-rack mount for this but ended up returning the superfluous mount). In fact the seat post connectors that came with it weren't the right size for my seat post, but that didn't matter, I swapped the clip for a reflector on the seat-post connector I already had (after a minor bit of drilling to make the old screw fit the new clip).Super happy with this, as I work late and particularly in the winter expect to be commuting home in the dark regularly.