I'm quite happy with mine. At work we have the deep one that fits recessed zerks.Yes they work great. Only issue is deep or shrouded zerks, its a bit fatter than a normal fitting
This brand works great - the other brands are terrible

I have a needle and rubber tip adapter each with a zerk in the back like this. No hose. Grease hoses are surprisingly dangerous if you hold it under pressure, and with the needle and cone tips you need to be holding them to use them, so no hoses on those for me, but otherwise it's a great idea....To avoid having two grease guns, you can make an adapter with a length of hose fed by a grease ****** and has a regular coupler on the end. Clip it in your lock-n-lube and you're back to a regular coupler.