Added this to my gravel bike, which I mostly ride on road. In order to fit wide tires, the chainstays on the bike flare out, leaving there to be little room between crank and frame. The new low profile 4iiii power meter fits just fine (the old one wouldn't)!
Otherwise, this power meter works like previous 4iiii power meters, which is to say, excellent. One thing to note, unlike previous versions, this doesn't support Chipolo features, so you can't use the power meter to locate a lost bike. I never used this feature (thankfully) on my other 4iiii PM, so I can't really I really miss it.