According to the product page, the Micro Converters also include re-clocking of the input signal:
https://www.blackmagicdesign.com/produc ... convertersIn terms of maximum cable lengths, the Micro Converters seem to do as well as the larger 3G Mini Converters, in my experience.
I've used the loop through output on the SDI to HDMI Micro Converters lots of times in a daisy chain configuration to send an SDI video signal to multiple HDMI-input TVs. Just have one converter at each TV and loop through SDI output to the next one.
The only real downside to this approach over a distribution amplifier (DA) is if you have an unstable power source somewhere in the chain (running off batteries, or if the converter is plugged in to a power strip with a switch someone could accidentally turn off, for example). Because if one of the converters loses power, you lose the video signal to anything further down the chain. With a DA and separate cable runs to each monitor, loss of signal or power at one monitor wouldn't necessarily affect the others.