I like using two when possible. One at the end of my drop bar & one on my glasses. Each provide features & benefits unique to their respective position & compliment ea other because they both have unique shortfalls. Bar end mount provides a bigger better quality image w less movement/shake but requires looking down which is bad approaching intersections. Unit on mirror (take a look) allows a glance backward while still looking forward which is great but the image is small & jittery & creates a blind spot- sometimes albeit rare at an inopportune moment. I’ve tried both versions of the take-a-look & haven’t noticed an appreciable recommendation for one over the other. A word of caution tho just cuz I use mirrors doesn’t mean I’ll be aware of all overtaking traffic. Meaning having them isn’t the same as using them
unknown brand bought at a consignment shop
sometimes Wifey blends in even w/ hi-viz wear
the Take-a-Look
the shorter model