Merino sleepsuits

Does anyone have any experience with merino sleepsuits, particularly for their use in summer?
DD refuses to let us zip her into her sleeping bag, hates blankets over her, and has been waking during the night when just wearing pyjamas to bed. Her room has been staying a fairly constant 23-24 degrees, but we have high humidity and it feels cooler than that in the early hours of the morning.
Unfortunately, we only get sporadic runs of sleeping through with her, so I can't definitely say its the change to bedding, just a guess.
As merino sleepsuits are apparently good for cool and warm weather, I was thinking of dressing her in one to cater for the coolish early morning.....I am concerned though that she will be too hot.....
Any thoughts?

I only used the merino sleep suit with DS when he was a newborn. From about 3 months we then switched to merino sleeping bags. Different to the sleep suits, but still merino. He slept in the merino bags whether it was the middle of winter or the middle of summer (even on 30 degree nights). The only thing I changed was what he had underneath. In winter it would be flannel pj's. In summer a tshirt body suit. I can say wholeheartedly, based on my experience merino is a fabulous fibre for LO's to sleep in and caters to all termperature differences really well. I very much doubt that she would be overheat in a merino sleep suit. HTH