I used it quite a bit a few years ago but found that I didn't have the equipment for it
The android phone I had then wasn't the best GPS receiver it took a little while to come on and settle. Also I had a lot of false readings where it ducked off 100 metres and back!
Now I have a Garmin Etrex 20 the readings are much more reliable but it's a pita getting the gps data from the Garmin to Strava, compared with an Android phone.
I used it the other day to get timings on my hill repeats, by setting up a segment for that. I will certainly be using it for this kind of thing
It's quite funny to see the mega speeds that are reported on Strava now compared with a couple of years ago. My old commuting route follows the same road as a 10 mile time trial so I've dropped from 1st to 3rd to 29th in the ratings
Before I was winning because I was the only one putting data into it
On the hilll repeats there are a couple of people who are doing that 187m climb in 8m20s whereas my best ever time is 11m