My PoolBot B150 arrived on time yesterday. I charged it up & dropped in into the pool which had a lot of gum tree leaves in it. No problem for the bot. It motored around & up the walls but struggled with the shallow top step. It finally gave up on the step & went back to th pool. What a great little machine. I just have to figure out how to instal the app to change to a shorter cleaning cycle as it cleans my pool in about an hour.