Bait pumps are they any good

I have been thinking of getting one and was wandering if any one has tried one or knows some one that has. For lug only I don’t think it would work on rag not were I would be getting it
[img]http://i50.photobucket.com/albums/f343/merv147/alvey-bait-pump.jpg[/img]

There useless for common blow lug, better off digging for them.There mostly used for black lug if u can find them.