They put somme Appa clones or vice versa rebranded loll "cough" meters loll
The 121gw is an unfinished meter, sorry with all it's goodness it's kinda good but, there was hardware errors (some fixed) and fw quircks, better hope with the 786,
Sure it's getting better as i said, but not for me i dont want to be a guinea pig
But i would go with the 869 or the 789 models, but they wiggle a bit on the bench, the 859s is better loll
And i hate some meter who doesn't start in voltage right after the OFF position, it could be desastrous if your probes where connected to something like a battery or a power source, yeah some tech does that loll me too (not the auto power off)
The 87V series are good BUT, i hate the fact they start in AC mode instead of DC, had a few at my job and tossed them away, i love older series without this annoying function, BUT it is safer if you do some mistakes loll
85 and 87 series III where the best, but as i said intense usage has it's quirks with them too, the dial contacts have to be cleaned and lubbed.
I had some meter beeping for nothing loll, and the power off sometimes was not totally off lolll some ghosts in them loll
Thats why an handheld DMM is easily replaced by a bench model, i have 3x venerable 34401a, and slowly im replacing them / sell them to end with an 34410a with a brand new VFD. That's another story
With intense usages your taste will differ, i take tons of voltages measurements, and some of theses meter get annoying to use (auto range speed, and the time they take to display the value) , really depend of the usage, i had to purchase old era tds 2000 "B"series of scope with their autorange modes, a real time saviour in my case, and hard to beat.
The Gossens are a special niche, you have the auto mode who is marvelous, auto AC-DC-Ohms ... Wow never had any problems with that function, display speed kill the fun loll
I think Fluke tried to copy that on some meters, i was not impressed, but worked okay, now some cheap brands whant to copy this loll
The esoteric M30S is one of a kind ....
Once again, what is best / good at this and that really depend of your "real needs" not having a Mercedes toy to play with loll
I too was influenced a bit when i've bought the "old" gossens, in the end i have paid more than a 7.5 digit meter loll I total 3 Gossens 2x 28 and 1x 29, not to rant, i do regret the purchase as i said, because of the time spent, cash spent, calibrations costs, and mostly import duties fees who spoil the fun
And threads like this will never end, because each person has different needs and tastes