I purchased the HD powder not knowing what it would be like (unusual for me) but I really wanted to try a translucent powder and I knew I already loved ELF's under eye setting powder.
Firstly I apply the powder over my foundation/BB cream and it gives a flawless result, eliminating any shine but not giving a full on matte (caked) finish- which I personally like as a finish. The powder is light and you can barely feel it on your skin. It covers any redness that may be showing through your foundation and somewhat blurs any fine lines, instead of sticking to them.
I find this powder to be perfect for everyday wear, although it isn't long-lasting. Keeping in mind I have combination-oily skin, the HD powder will stay on my skin during a normal day but I don't find it suitable for a night out, where I would have to touch up.
I do find the packaging very bulky and hard to travel with, as it tends to go everywhere, and some of the product is wasted. But if you are careful and keep the beauty puff inside the packaging, it will stop the loose powder spreading everywhere.
I use this powder everyday and will continue to! It doesn't break me out as other powders have (such as the Australis fresh and flawless powder). For $6 or under this product is an absolute steal! and I would recommend to try it as you can't go wrong for $6.
I use this powder as a finish over my foundation and it gives a great matte finish to your skin and helps set makeup to last much longer. You don't need to use too much as if you do it will give it a whitish visible tint. It's very soft, however the powder does tent to get everywhere if you're not being careful.
Tips: Use the e.l.f. mineral powder brush to apply for a better finish.