How is it? Is it worth getting?

I have chosen to stay away from it. I don't like what it does to Barenziah etc. despite being correct.

There are some good thing about it, however don't install the changes to the default classes as it gives all "battlemages"(renamed to overlord) up to 200 hp per level.

I have no need for it. In essence, AndyFall:

1) Replaces enemy Battlemagi with ridiculously powerful "Overlords".
2) Swaps guards' sprites with the old unused sprites of humans riding on horseback (another thing unfortunately cut from the game). Including indoors, since it's nothing more than a sprite change.
3) Modifies Barenziah and her family to have the more realistic ash-skinned Dunmer look. As lore accurate is this is, I've grown fond of their more human appearance over the years.
4) Replaces a bunch of miscellaneous bits of clothing with, yes, leather bdsn gear.

Thanks. I passed the first time around and I guess I will again.

I've been using it awhile and I'm not sure if its the mod or not but the guards aren't able to hurt me anymore. One character is a level 31 high elf custom mage werewolf that can't get hurt with no armor, but then my level 6 thief also isn't hurt either. Ether its their dodge skill or the guards are nerfed.

lycanthropes generally can't be hurt by guards, who generally have weapons which are worse than silver...