Like said above, save your money if all your tryin to do is attract deer to a spot now. If your wanting to create a mineral site that will probably go unnoticed this season but be used next year and on go ahead and get some. I think the powder mixed with water works better for making a site. Set it up in area that holds some water or stays wet longer than the rest of the nearby soil. Twice a year place a mineral block in that spot or if the spot has an inch or so of water just pour on another bag and mix it in. You want the minerals to get into the soil.
When I add another block I usually break it into a couple pieces, falls apart and goes into the soil better that way
Wingshooting is like sex for me - I love doing it but I'm just not that good at it.