Very useful. Do as i did, take the headgear and hide it, keep the chest you like, and go for endgame with the rest. Boots and gloves are rather plain so no issues with them.
5% shield and 2% damage reduction are actually rather neat as far as gear bonuses go.
Thanks for your feedback. I probably worded my question poorly. I know they are useful, especially as compared to other gear set bonuses, but are they true difference makers? Are the set bonuses truly noticeable in action?