I really liked my Wahoo, for maybe 4 years? I forget when I got it. Then it started flaking out and then quit working. The strap was getting a bit stretched out, too.

I got a Polar H9, and like it a lot.

For a year now, it's worked very reliably with my Garmin 1030, and with Zwift.
Huh---I just fired up the phone Polar Beat app, remembered I never found a good use for it, and closed it. Even closed, it's got the bluetooth connection locked up, so the Zwift PC app can't see the Polar. Grrr. turning off bluetooth briefly on the phone fixed the Zwift connection.

Pluses:
The strap seems very well designed, and the electrode pads are smooth and well integrated into the strap.
The buckle is small and very flat -- but see the minuses below.
The strap instantly starts transmitting as soon as I put it on. I would always wet the Wahoo sensors with tap water when I put it on.

Minuses:
It's supposed to use the slightly thinner CR2025 instead of the usual CR2032. (some reports of CR2032 working, I think, but I got a 6 pack of 2025s to use on this.)
The strap adjuster is almost all the way out, and my chest is somewhat narrow. I wonder how this would fit on a larger or heavier person.
The buckle is on my left side, which works ok. But it's release is a bit fiddly to open.
I did like the tiny LED status lights on the Wahoo, just to see that it was working.