Does anyone run a set up like this?

So I wear a Fenix 7x with a HRMPro Plus for my running and swimming. I recently purchased a bike to start training for triathlons but don't want to drop the extra money on a dedicated cycling computer just yet. Does anyone have any experience with a handlebar mounted watch holder that can be easily taken off during transition? I've found stuff like the picture but don't know.if it's worth the time and effort to make it work.

So I wear a Fenix 7x with a HRMPro Plus for my running and swimming. I recently purchased a bike to start training for triathlons but don't want to drop the extra money on a dedicated cycling computer just yet. Does anyone have any experience with a handlebar mounted watch holder that can be easily taken off during transition? I've found stuff like the picture but don't know.if it's worth the time and effort to make it work.