These are much larger in person then expected, but with the big size D batteries in them you can imagine. They are BIG. They won't look good in a very very flat space with no bushes and no walls. Next to my bushes they look perfect and from far away not as large as when held. I can't tell how long the batteries will last, as we love our blink camera but with how much my kid goes in and out she wears the batteries down (and my front door hinges). We set them to only work at night so I am hoping that reduces the battery usage a lot. You can aim the sensor in the direction you want motion to be detected so we aimed ours less at the road and more at my front door and windows of my house.. and then one more towards the front yard so that it would go if anyone was close to the front of the house and it would go off when we pull in the driveway. They look fantastic and I hope they last. VERY heavy and sturdy feeling. No issues pushing into the ground but anyone who has ever used similar style things knows not to twist hard because end of the day its plastic.