I was looking for a set of replacement sights for my Sig Sauer p938 and happened across these new sights by TRUGLO. Overall, I'm pretty impressed with them, especially for the price (see them for $70 online). No drawbacks noted.

YouTube: TRUGLO Tritium Pro Handgun Sights | Trijicon HD Alternative?

I just ordered a set on Amazon this afternoon.
where are you seeing them for $70? 
I see them for $100-120.

When I google them, I get a hit from "Jet" for $72 and free shipping. Not familiar with that website, shough.

Picking up my second pair from Amazon. They run about $73 Shipped for Glock Sights.

I'm loving these things and I'm dumping my Ameriglo IDOT Pros.

The machining/quality is great and the finish is probably melonite or nitride. The Ameriglos seem cheap in comparison.

I love the serrated rear sight and the U notch. Also even though the front sight has a white outline, I have no issues picking it up.

The Glock sights also have a ledge for racking the slide with one hand.

I put some on my G20 yesterday.  Very bright in the day and night.  Love them so far.