hand held or bench oscilloscope?

[Doddy]

I'm looking at getting an oscilloscope and cant decide on a decent "ish" hand held one for basic signal checking or whether to just go for bench one?

Horses for courses, all down to how much use you expect to get out of it. And how much you want to spend

the Hantek ones seem to get good reviews and isn't to pricey at just over a ton.

Cute, and useful, all in a small package. It will work for most of what you're expecting to use it for.

it will mainly be for logic testing on Arduinos, STM32 etc but I can see it might be handy for the workshop as well. does any one use oscilloscopes on their CNC setups?

Yes, is the easy answer, and probably less that I should given that I have a bench scope. Like anything they are a string to your debugging bow. One of a number of tools that you can use to diagnose problems. I've used mine to realise the problems with the NVEM motion controllers and slow-speed stepper drivers, for diagnosing problems with a spindle encoder on the lathe, testing the BLDC controller on the Sieg - also to reverse-engineer the protocol to the Sieg pendant controller.

Realise its limitations - very limited trigger control, some talk of offsets not being displayed (quite basic - surprised if that doesn't get fixed), limited memory for storing trace data. The best description I've read in a quick trawl is that it's a good supplement to a DMM and a bench scope - a happy middle-grounder.

Probably okay with Arduino but limited with the STM32 (bandwidth, memory depth etc).

Personally - I'd prefer a bench scope and I bought a Rigol DS1074Z - but wish I'd bought the 1054Z instead (they are hackable to 100MHz) - reasonably large trace buffer and good trigger and decoder options (try debugging an IIC bus with the Hantek!). But, it is a personal choice and one borne from your use-case. If you've up to your armpits in a lathe cabinet (ask me how I know) - maybe the Hantek is a more accessible and usable option.

If you want to do a lot with micro controllers you may want to consider a separate scope (such as the Hantek) and a dedicated logic analyser device. Very different beasts.