Anyone used a Western Mountaineering Alder MF sleeping bag with a summer coupler?

My wife and I have used one for about the past 5 years. I'm 6' 200lb and she's 5' 9" around 130lb. It's cozy. Not drafty at all. However we are very "independent" sleepers and have gone back to separate bags. I was a little cramped, and she's a very cold sleeper so is a bit warmer being fully cocooned on her own. It's a good system and served us well but I do feel like we're sleeping better in our own setups. That doesn't mean it wouldn't be right for you though and you can't beat the weight savings.