Clipper servicing/blade sharpening recommendations

[NikNak1]

I have some liveryman harmony clippers that need servicing and blade sharpening, anyone had any experiences with companies that they would/wouldn't recommend? From a quick google there looks like a lot of choice and pretty similar pricewise

 

[Sugar_and_Spice]

Shear Ease are good. I always use them for servicing and sharpening