Yep, whatever you buy, I’d strongly suggest you try to lean on them with full bodyweight before parting with cash regardless of the locking mechanism. I’ve come across both twist lock and lever lock-type poles that have simply telescoped under pressure and not from cheap brands either.
That may not matter for ambling around low level footpaths, but if you’re using them, say, for coming down something rocky with a big pack on and use them to brace yourself and the pole compresses under your weight, say as you’re stepping down, it’s potentially dangerous.
I don’t use them generally, but they’re handy for walking with big packs on uneven ground. I like the Black Diamond Flicklock poles, but they’re not cheap. Ditto Leki. Lever lock types as a rule more secure and easier to use with gloves, but if the manufacturer’s got the leverage ratio wrong, they can still give way.