i have the cygolight mitycross 350, and the and the older cygolight hi-flux II. either light provides sufficient (not great) illumination for my commute home. on some occasions i will put both on for added lighting -but the challenge is getting enough real estate to secure the battery packs.
given that, knowing after a couple years of use i still would prefer the convenience of having just the single piece unit - and not having to deal with the battery packs.
i have also the PB 2W blaze which is use for weekends when i feel i might be late, but don't want the additional hardware.