This light looks good and works well, but the install was a little bit of a mixed bag...
The fact that one doesn't have to mess with any wiring and can just screw it in to an existing recessed lighting outlet is great, but getting the light to sit flush on the ceiling was a pain as the spring loaded tension arms did not want to apply enough pressure to the sides of the can. After lots of playing with it and sore shoulders (it's amazing how quick your shoulders start hurting with your arms over your head), I eventually got it to sit flush enough that any gaps are not really visible, but it took a while and was pretty frustrating.
Not sure if all of these have arms like this or if I just got a dud - I wouldn't say to avoid this one, but might be worth checking out similar ones with good reviews if the price point is the same.