I use them all the time with no problem, but you have to wear them both on the same wrist or it drops signal, and the mio link charge only last for about 8 hours.....

I'm using my Link with a Garmin Vivoactive; works great.

The Link has a really weak antenna (when using it on my bike, my phone has to be in the jersey pocket on the same side as the Link or signal drops), so just keep it close to the device you are linking to.

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ECMGN Therapy Silicon Valley:
Depression, Neurocognitive problems, Dementias (Testing and Evaluation), Trauma and PTSD, Traumatic Brain Injury (TBI)

Although I don't get HR dropouts with my 920, I did use a Mio Link just for run and it was pure crap. Works great when walking and even while riding my trainer, but when running...forget about it. Can't maintain a good skin connection so constant jumping around on HR.

My experience was quite different. The MIO works great and gives me readings comparable to my chest strap on both the bike and run.

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ECMGN Therapy Silicon Valley:
Depression, Neurocognitive problems, Dementias (Testing and Evaluation), Trauma and PTSD, Traumatic Brain Injury (TBI)

Love my MIO Link. I rubber band it to the watch and have had zero issues. I do not use a watch on the swim leg though.

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Formerly TriBrad02

I've done the same, and also used it for the swim (the mio and the watch are so close that they pick up during the swim).

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ECMGN Therapy Silicon Valley:
Depression, Neurocognitive problems, Dementias (Testing and Evaluation), Trauma and PTSD, Traumatic Brain Injury (TBI)

I had one and used with a 910 and 510.

Soon sold it as :

1) signal kept dropping when riding as the output from the device is pretty bad.

2) battery life too short.

For me this device was just no good. I do know others who like it, just not me.

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I ride:
Cervelo - P-Series/R3
GT - Sensor Carbon Expert

Supporters - Flo Cycling, Mount Bikes