Just a theory. Just because it's cheaper, doesn't mean it's crap. And I'm not defending Uni-T. This applies to a lot of cheap test equipment like Atten, Rigol etc.
you can perfectly buy a piece of crap, best example are DSOs from
Owon - all these PDS/EDU crap of series
Huatest (
www.huatest.cn) HT100A/HT100B
Jingce-sz (jingce-sz.cn) JC1102TA/JC1102CA
Longwei (
http://hklongwei.en.alibaba.com/ lol, even no company website) - LW2102B
MCH (
http://mchinstruments.itrademarket.com/) - DS-2100CA
they didn't worth even a single line of text here - but they costs exact the same as UNI-T UTD2102CEL.
So looking from that point UTD2102CEL is a good scope.
There is of course , as always, something what i don't like - when you buy older hw revision of CEL model
you will see how crappy they are - and probably never ever see firmware update (you have to be carefull, many
dealers have still these old revisions). When you buy new revision you have to worry about your live, the power
supply or better said how it has been mounted a 1cm above main PCB is just a bad joke. Oh, and of course
the new revision have still the same crappy firmware.
Sure UNI-T will work, and of course you can measure/work with such DSO a light years better as with these
"no idea what kind of toy DSOs they are" listed above - but is it worth money? I don't know, a cheap Siglent/Atten is probably
better choice.
Btw, if i would buy a toy DSO, then it will be probably LUCK3 from realt.cn
This toy costs 120USD and is just pure fun toy-like DSO. Actually Realt is not a real manufacturer, they selling rebranded
things, no idea who is the original designer. Realt.cn is for example having rebranded Tekway DSOs, and they even a bit
cheaper than directly from Tekway, somehow funny.