I had a Cateye Stealth and liked it for exactly the reasons you want it for:
– Didn’t want to use phone batteries on GPS functionality
– Didn’t need all the other things a Garmin can do
– Fed up with trying to get a magnet and sensor to read wheel revolutions on old style speedo/mileage computers
It was great for recording, uploading and charged easily between rides on its cradle.
The cradle however was its weakness in my case as it eventually stopped reading and charging. Wiggle were very good at a refund based on it packing in after six months.
I used a Garmin watch strapped to my stem when I sent the Cateye back and realised that configured properly (which I’d never bothered to do as I just ran with it) the watch was just as good as a bike computer as the Cateye was. That’s the only reason I didn’t bother getting a replacement. I have however recommended them to mates with similar wishes to you.