We have used one (I THINK it's a nekkie blankie, we lucked into it used at a thrift store). I loved it while Nell was non-mobile, but never really got into it for nighttime. My dd wanders all over the bed at night, but the biggest problem was that it just wasn't comfortable for me to be on the nekkie blankie (dd sleeps right next to me, so I end up sleeping on it too). I don't remember why--I think it was because it wasn't big enough for my whole body, yet it was thick, so I felt the edges (and mine's old, so the edges are kind of curled up). Plus, I flip her back and forth to either side of me as she nurses throughout the night--I was having to flip the blankie from side to side too, which was a pain. Also, it's waterproof, so I felt a bit more sweaty. But that's just me.<br><br>
Probably it would be really useful for you to have something like that while you are learning, and then once your ds stops having nighttime accidents and you get your confidence up, you'll ditch it. We keep dd in dipes at night when she's unpredictable (now that I know her night time cues), and when she's doing well, we leave her naked butt. I would recommend keeping 2 bath towels and a comfortable baby quilt next to your bed if you are letting him go naked. Then if there is an accident, you can use the first towel to mop up the puddle, lay the second one down on the bed to soak up the pee from the mattress, and cover it with the baby quilt so that you're lying on something comfortable (can you tell I have some experience dealing with misses? Actually at night, I make my dh deal with pee misses in the bed 'cause I do all the nighttime pottying otherwise, and if we miss I'm usually covered with pee and pissed off to boot! But this is what he does at any rate...)<br><br>
Good luck! While we were learning, what I did was that I slept really really poorly for a few nights in a row... <img alt="" class="inlineimg" src="http://www.mothering.com/discussions/images/smilies/redface.gif" style="border:0px solid;" title="Embarrassment"> Seriously though, I would sleep with my hand in her diaper (too chicken to go naked right away) so that I could tell when she started to pee!