I've got the Lee scale, and others, too--
and I find the Lee scale can work just fine. Personally, it is my preferred scale at my bench, but mostly because of its smaller size. However: I had one Lee scale go bad after some years because that SS razor pivot did get damaged. (I suspect it was handled carelessly during a household move.)
Other foibles of the Lee scale include:
1. Not setting the beam correctly on the balance point;
2. Having the ball-bearing counterbalance jump a bin--thereby changing the setting by 10 grains;
3. Not using the vernier scale correctly;
4. excessive fluctuation if the charge weight is significantly different from the scale setting.
Many find it cumbersome to set and use; I don't.
Here's a tip for setting the charge weight accurately and 'easily:'
Pick up the beam and hold it with both hands. Leaving the 'friction pin' in so there is drag, now put your thumbs on either side of the vernier slide, and adjust it to your chosen weight by pushing with either thumb. The friction pin maintains the setting you've chosen, without fumbling to push in the pin after setting the chosen charge weight.
A related advantage to this technique is that you can get it "in front of you" to accurately read the scale--IOW, a real benefit for those of us with "older eyes."
The disadvantage is that 1) the ball bearing counterweight can jump a bin (or more), and 2) you have to ensure that you set the beam back on the balance point correctly. (Usually, but not always, if it is not on the point correctly, the magnetic dampening will 'drag' / be off-center.
Is it the best scale? No, not by a long shot (so to speak), but it will work accurately if you know how to use it.
Jim H.