Hello,
I have an old ut-61e and I appreciate it because it's the only one with 20000counts and an IR-usb data-logger for about 10eur more.
Freesoft Sigrok is perfect in simple reading its data. I feel that ohm mesasures are 5counts too light : with 2 or 3 série or parallel resistors (at 10kohm) I get 4995, 9995, 14995, and 19995. I don't know the exact value of these resistors, bu this error isn't a proportional error, but an offset error. I don't know its proportional error.
This one doesn't have temperature measures, others ut-61 have, but they only have 4000 or 6000counts. ut-61a has not usb link ability. One of the ut-71 has also and temperature measures and 30000 or 40000count and usb link, but it is older, more complex to use and a lot of people explain it is less secure for mains use. With it's IR-usb link (recognise by Sigrok) it costs about 100eur with its usb link.
Hope this help !