Started with a Surge,had 2 straps break (got complete new replacement watches under warranty) so then switched to Tomtom spark which was ideal for me being fully waterproof as I swim a lot.
The Tomtom app is nowhere near as good as Fitbit's, so when the strap and charger both broke and replacements took ages to come I switched back to Fitbit.
Currently wear Alta HR which is a bit girly but works well, and Flex 2 for swimming.
Looking forward to a waterproof fitbit that also has HR so I don't have to keep switching.