I stayed here with my wife and our 2-year old daughter. The space was sufficient for us, but the space conscious may find it a tad tight. It didn't bother us, as we only returned for naps and bed time. Janet provided lots of extra amenities that made our stay much more enjoyable, such as snacks for the kid, beach supplies, a pack n play (with extra sheets included!), a tv with Netflix, to name just a few. The location, two blocks from the ocean, walkable to mission and pacific beach, was excellent! Communication exceeded expectations--Janet was friendly, proactive, and really embraces the community aspect of Airbnb.
The only downside worth noting is that this a very dense neighborhood, and the main thoroughfare is just a couple doors down, so there can be some noise at times. But I think that comes with the territory of staying in mission beach. Important to note is that evenings after 9-10 or so we're generally quite quiet.
Overall would highly recommend.