Is MIUI 9 a good upgrade for LG Aristo?

Doing some reseaech, I ran across an upgrade for lg aristo called muiu 9.  Is this safe? Is it legal? Will it improve speed and functionality as stated on androidash?

If you found a stable version of MIUI 9 for your LG Aristo then I guess it should be good. But I highly suggest reading other user who tried it before installing it.

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