I commute in very mixed circumstances, which is why I thought about it as I don't mind cycling the first few miles in the morning but the last few miles at night are murder because of the traffic.
I think I will give it a go then, if you recommend it.
It will go a bit mad with traffic, but really, really useful in all other circumstances.
I paid £40 more & still feel it was value for me.
Used for 19d LEJoG and also a 7 day ride this year (see sig x the broken limb wasn’t mine 😉), as well as countless 1 day rides, mostly countryside.
I found it always gave great warnings.
If a car was ‘red’ (coming fast), I might ‘wobble’ a bit: the red light changes from a regular flash to a more insistent flash, & drivers always slowed.
If approaching a hazard (brow of hill, or somewhere I felt they should not overtake me), I might chose to move more into the road.
At some stage I might check behind me, but honestly, after some usage I came to trust it a LOT to help me, & when you do NOT look over your shoulder, cars tend to behave more (maybe they think you are deaf or old….half true for me!).
Just IMHO, of course: heavy traffic lessens the value as it will always trigger. I never cycle without mine on now! 2 years in….