For me, the 310 works very well, it is a robust and lightweight product, the blade is sharp and it fits well in my (large) hand. HOWEVER, my girlfriend (medium sized hand) Finds That The Spring opens up the shears too much, Which makes it a bit hard to handle for her.
Note, That the handle of thesis shears is all plastic - not plastic coated metal like the pruners. So the general feel of the product is slightly flimsy Compared to the rest of the (extremely sturdy) Felco line. But for the light-duty tasks That thesis shears are Intended for, it Should be no problem at all.
