No, the MXX 123 doesn't have a flip-up hard cover. It does come with a glass ring that fits around the edge of the pan that's supposed to deflect drafts that might upset the scale as it's weighing. The ring is only about 1" tall, so it doesn't interfere with reaching over it to pick up the scale pan off one of my Redding balances that I've been using on the 123. I found it easy to level the scale,it has a built-in bubble level) with its adjustable feet, and it took only a few seconds to do the initial calibration, using the supplied calibration weight. I'm very pleased with the ease of use, its stability, speed of settling on a reading, and the precision of having a scale capable of resolving the weight of a single kernal of powder.
However, in my drafty old house,built in 1909), there are pitfalls to having a scale with this much sensitivity. Even in the basement, there are air currents strong enough to upset this balance when the wind blows as hard as it's been blowing for the past several days. We had strong southerly winds over Thanksgiving and Friday - 20-30mph with higher gusts. Then all day Sunday, blizzard-like conditions with winds of 45mph with gusts to 50-60mph have carried over into today, making it impossible to use the scale. This isn't a criticism, though those of you with homes more air-tight than mine might mistake it for such. Neither the Dillon nor Lyman units function well under these conditions either. The wind's going to have to die down to a more typical western Kansas breeze of 10-15mph before I'll attempt to do more loading.
The one evening when there wasn't much wind, it seemed to have warmed up or stabilized within about 5 min., and drifted off zero only once in the time it took to weigh out 25 charges of N560 for some 6.5x55 ammo. Re-zeroing takes only a second or so. The display is quite a bit larger than that of the Dillon, and is backlit, making it very easy to read.
You will want to have the owner's manual available during setup though, as I found it a little difficult to interpret some of the display's rather cryptic messages when I toggled the unit of measure from grams to grains. This unit is capable of several different functions that most reloaders will never use, but these are well-covered in the 19 pages comprising the English language portion of the owner's manual. Setup, unit of measure selection, and calibration are easily accomplished, and for those of you who want to be able to just unpack and start using it, you should be able to suffer through reading the 2-3 pages covering those items.
So far, I'm very pleased with the MXX 123, and would certainly make the purchase again. I feel it's quite an improvement over my old,'92) Dillon Determinator - nearly as big a step up as the Dillon was over the beam balances I'd been using for 26yrs. Hopefully, it'll be as durable as the Dillon has been - time will tell.