That's what we use at night. I used sposies at night until trying a Firefly Sleeptight. That worked great, but the rise is high on ds and the medium was tight around the middle. I still use it, but I prefer the Little Beetle. It's rise is lower, which works better for ds as he's built like a Russian...very stout with a pot belly and a very low rise. It is super absorbant. The combination of hemp makes it very effective. I did get the Beetle Booster and I usually us it, but he really does not need it. He sleeps 12 hours at night. Tonight I put a wool double in it instead. I got the kind that snappies and I really like it. There is lots of room for ds to grow in, the wings almost touch each other with the snappi on (he's about 20lbs with chunky thighs). You can now get them with snaps, I might try one of those.
Go for it. She has an introductary cupon and even without the cupon they are very reasonably priced for such a great night time diaper.