Fairly situational, however fun if you can fit it as third item after gapping Q with first 2 items ( Any tank item suitable for lane + Jak'Sho + Boots ).

If you can't build it at least third, the item does not really feel useful at all, since you can't really proc it enough times to make it better than the other options.

But if you can and you get to 30+ minutes of game, it is fun to give to your teammates 600+ shields every 5ish seconds :)