Felco or the Felco rollers specifically?

The Felco rollers have just such a nice feel, weight and ergonomics. The roller will open with your hand as you open the jaws of the secateurs, with the help of the spring there is minimal movement on your hands, leading to less blisters and strain for long working hours. The force is applied throughout your 4 finger length from tip to then toward your palm as you squeeze for better grip.

That plus nice new Swiss factory sharpened blades and you can go for hours. Although my old man now buys blades off ebay from Germany instead of the Swiss ones. Good steel from Germany.

And as this is bifl, you can get replacement parts when needed and they are very serviceable.