I have the scarecrow. Works fantastic, but you have to be able to get a hose to your garden. I have three large gardens, and rotate the scarecrow each week. It covers a large area.
Not only does it scare the critters away with the water, but it has an eye that comes on, and it makes a clicking noise when it comes on, and that alone gets the action going. We've seen the deer run, in person. You can set it for as low, or as high as you want, so it would get the rabbits, and keep the birds out of the blueberry bushes.
Best investment I ever made for the garden.