So I’ve had the New Ace lights for awhile now, and have been using them on both day and night rides.
They are designed for commuters, their power output is low, however it’s noticeable, not quite as retina searing bright as the Icon+, but they get the job done.

But, there are issues. First off was battery life. Initially, it sucked. They would run out of juice just sitting there on the desk, meaning a charge every day. A firmware update went a long way to curing this, unless you are an Android user. The companion app took months to arrive from see.sense, they blamed the exit of their developer, and farmed it out to an external company. A release was made, but it lacked almost all the features, and was pretty much only able to turn the lights on an off. So if you wanted to update the firmware, you needed an iOS device, or at the very least a mate with an iOS device..
Now, in the latest Kickstarter news letter, they’ve stated an in-house android developer will soon be starting, so hopefully we shall have a passable android app soon(ish).
Other than the poor development and battery life issues, they really are quite a good set of lights for commuting with.
The mounting options for the lights are first class, you get a multitude of mounts as standard: including a seat-post mount, aero seat-post mount, and bag clip, which I use to mount to the back of my jacket as I’ve two rears, so one on the seat post, and one on my back. There have been reports of lights falling out of the cradle, but I assume this is due to not being clipped in correctly. My lights seem to be in solid when clipped in correctly. See.Sense, to my horror lobbed a poor innocent bike off a roof, and the lights stayed on, that was the icon2, however it uses the same mounting system.
The ACE lights feature the same intelligence of the previous lights, with a little more processing power. They can track changes in movement, g-force, and ambient lighting; tailoring the light output to the conditions and surroundings: for example, on a quiet road the light lets out just a gentle pulse, but if a car’s headlights are detected then the light lets out a sudden burst to increase awareness.
The reactivity both noticeably improves road presence, compared to a regular mid-power flasher. My only continued niggle with the reactive element of the See.Sense lights is that the sudden bursts of light from the front light can be a little distracting. This is because the light is designed to have good side visibility, which unfortunately includes the upper side too – upwards towards your eyes, should you have it mounted horizontal on the bars. To be fair, my favourite daytime lights also have this issue, the Exposure Trace. A sliver of electrical tape however remedies this.
The Smartphone integration allows you to tailor the output of the light to further improve battery life. It also allows you to use the movement sensor as a theft alert. Both useful features, if they ever get the android app to release.