First full sans family - A little criticism please

Hello All! 
Long time listener, first-time caller (Sorry, I couldn't resist).

A little about myself, I am a designer/art director with nearly 20 years of experience. Throughout my career, I've always loved drawing letters, typically for one-off logotypes, but I've never actually tried to finish a full typeface.

My interest in drawing letterforms has taken me to various workshops (Crafting Type) and intensives (Reading) to hone my craft WITH the added benefit of focused criticism, which brings me to post where I'm currently at with my first full family.

I know that there are so many excellent sans-serif families. This process is less about making a product for the market and more about finishing a full typeface. My idea was to create a sans-serif family that is contemporary, economical (in space) and readable.

I'm still working on some general spacing issues and some additional drawing tweaks through the spacing process.

I'd love any criticism(s) that you have to offer. An A4 PDF is attached.

Many Thanks in Advance!