I looked at a speedy one but you need two hands I like the pistol ones as half the time you have to hold something right to get at nipple! That sounds wrong
I bought the Fuchs one and a box of Fuchs grease cartridges last year, based on discussions on this forum. My only regret is that I didn't buy one sooner. I have tried various grease guns and this is the best solution in my opinion.Fuchs is the best I have.
So easy to swap the cartridge as it just screws on.
And I have never had an air block!
I use it rather than an electric grease gun I have as you can feel and hear if the grease is going where it should.
Our bog standard C. K. has lasted years, despite being run over. I always fill with loose grease - no air pockets, no problem.
Those that blame the tool do not know how to use it.
A lot of the time it's the cartridge not the gun at fault