Has anyone tried UNI-T's new 17B Pro meter?

[EEVblog]

The lack of independent verification (which UT139 has) is surely a turnoff, but it doesn't tell the whole story. Reputable brands such as Yokogawa, Sanwa and Hioki do in-house certification but they have a good reputation and track record of pushing out decent gear (a bit less on Yokogawa, but still). Uni-T has goofed up so many times in the past that they have a very long road ahead to boast any quality claims for in-house testing. There's also that pesky loophole the cert agency will only test whatever you ask them to, and that could easily be circumvented (among other potential loopholes)

Yes, Uni-T have the reputation of being "hit and miss", at least to those who follow the industry. Those in the know are going to buy a Fluke or Brymen or one of the Japanese brands in those instances if it's guaranteed safety and design and build quality you are after.
Many people don't know nor care though, they just look at price and some marketing blurb on an ebay listing.

[Lightages]

I have some Uni-T meters. The cheap ones serve the cheap use. Keep them away from things that need safety. The UT139C and the UT17X series are the only I have that I would recommend for general around the house electrical work. Everything else Uni-T that I have seen should be kept to batteries and CATI use unless proven to be safe otherwise. Having said that the clamp meters should be safe for any clamp use but be wary of using the probes over CATII.

[ledtester]

A video review of the UNI-T 15B PRO:

https://youtu.be/a6ZJFw5WoUo

Tear-down begins at around 14:30.