What kind of portable sprinklers do you guys like?

I have seen the ones that spin around and go click click click, the ones that spray about 20-30 streams of water and goes back and forth, and the ones that are basically long lengths of flat hose with holes in them.

Which do you guys prefer and why? I have no idea what to get.

 

Are you watering grass or plants/beds?

 

For the foreseeable future it will be grass/weeds only. I have .5 acres on a corner lot, so I will need something that can water large areas. Although the front will be a challenge as there are large trees there.