I realise this is an older thread (though still a bit active, however as I had a stroke on Jan 9,2018 and have been recovering since I often find myself 1 to 1-1/2 years behind on the forums. In any event I just today received my Hantek 2D42 instrument and thought I'd offer some initial thoughts (mostly ergonomics at this point).
FWIW:
I ordered this as a replacement for a Jinhan JDS2022A I had for just shy of four weeks, though a capable instrument with a slightly larger display (3.4" v. 2.8", but still 320x240), I found that in just three weeks of casual use the membrane keyboard overlay had begun to crack. Having had more than one membrane keyboard self-destruct in the past it went back to Amazon;
The user interface does take some getting used to--the Jinhan seemed a bit more "intuitive" (though I genuinely dislike that word);
The silly rubber condom wrapped about the Hantek's body just made it difficult for my fat old arthritic fingers to attach/detach BNC plugs to the recessed (overly) connectors, as I am not the sort to bang about my tools anyway it had to go;
The equally silly and annoying rubber cover for the USB/charging connector came off while removing the condom--no great loss there;
The batteries showed 3 of 4 bars as received, connecting it to a 2.1A 5V source revealed it drawing 90 mA at that stage of charging; 1.2 A when powered up and charging.
I shall post again when I've had some time to properly evaluate the little beast.
<addendum 2019-06-23>
Sent it back yesterday (I really like Amazon).
The recessed BNC connections were a major PITA for me. Also the available waveform measurement values were quite meager and the small low contrast (yellow and lime green on light gray) was damned near invisible to my old eyes.THe built-in DDS generator was kind of cool, however I have plenty of signal generators.
So, I ordered an Owon HDS1021M-N. THis was with some trepidation as I have an older (2004) HDS1022M-N on which--past warranty of course--the power switch got flakey and then failed--then the plastic outer shell disintegrated, crumbling in my hands (crummy "green" plastic typical of the late 90s to mid-2000s) BUt, for functionality they cannot be beat. 20 MHz, 500 Msps with numerous measurement functions, FFT and periodic data recording (great for monitoring battery discharge characteristics
We'll see; it too can go back within 30 days.
</addendum 2019-06-23>
<addendum 2019-07/31>
WEll the Owon went back too--the display is smallish at 3.7", it is 640 x 480 resolution, however screen dumps are curiously save at 320x 240
As I will be using this addition to my tool bin to document automotive waveforms for my doctoral dissertation I want/need the best looking images i can get. So i got a hantek DSO 1062B which seems a nice 'scope so far. great 5.6" 640 x 480 display, 1 GS/s real-time 25 GS/s repetitive. FFT and other math functions, a nice selection of automated measurements, and can save .BMP screen captures, .GIF animations, and waveform data to a directly connected USB jump drive (the Owon has an awkward dongle used to connect a jump drive). The multimeter capability is nice i guess, as it will allow me to capture metered values to image files for publication.
It was $389 from Amazon, twice the cost of the 2D42, and a bit more than the Owon--but an unfortunate fact of life--I.e. "
If you do get what you pay for--if you buy the cheapest there is, there is a good chance you will get the cheapest there is"...
</addendum 2019-07/31>