Hey Lisa! I have a Puggle too and I LOVE HER! And she was VERY hard to housebreak, but now she is a wonderful dog. She is great with Ella, which was very important to me. My only complaint is she is VERY social. If we are in the other room and she can not get in, she will whine until she is let in with us. When we first got her, we kept her in the kitchen at night and a year later (I am not eggaterating...a year later) she was STILL whinning at night for hours because she wanted to be with us. We finally gave in and now she sleeps in the bed with us.
She loves to run (no breathing problems) but she does like to run away, which drives me crazy. We have to have a leash on her at all times. She chases rabbits and squirrels, just like a beagle. And her bark is not bad at all. It is not all beagle, but it is not really pug either. Maybe it depends on the puggle, what they get. I guess I would say she is more beagle bark, but no howl.
She is VERY high energy and nees a walk/run daily. If she doesn't get it, she runs laps in the house like a mad dog. Ella loves it when she does it because she thinks it is funny, but it always makes me feel bad that she has all this energy and I did not take her for a walk to get it out.
So, overall, LOVE HER, although she is stubborn and too social