Living in Santa Fe for many years, I have accumulated a very large collection of Native American jewelry. I am a fan of jewelry as art. And I love the ethnography of pieces around the world.
Its sorta my "thang". 
I like the fact that AW is American-made. Its infused here and there with pieces deigned by Native American artists (although the majority are not and are indeed merely the style).
Often, AW - for me - is a bit too "western Victorian" inspired for my personal tastes. Its a valid style, just not my style.
I think what AW does best is when they offer a rather simple, contemporary design. I'm not a flourishes and 1870's silver mine curly cue details person.
And the pieces which attempt to look like or pay homage to traditional Native American pieces, while nice, are definitely fashion-bent rather than authentic in most ways.
Not that there is anything wrong with that. QVC is a fashion-oriented retailer and not a museum store, if you will. lol
When you live in Santa Fe, you obviously see the world's greatest Native American jewelry and designs. You also see the sticker prices. So AW, for what it offers, does a rather good job delivering at a very particular price point.
I have been to the WAREHOUSES of jewelry that are in Albuquerque. Not just the slew of stores offering more accessible items as AW is - but actual warehouses where there are simply thousands and thousands of pieces housed...and ready to supply stores everywhere (all over the world).
You then really see why the premier jewelers have the status and prices which they do. Most of the jewelry produced is "western native" (sometimes Native American) in mass production. Santa Fe and a few galleries in Albuquerque offer true artisan pieces. And the prices are in the thousands -to start.
Some of the best deals - sometimes (only sometimes) - is a find when you're in Gallup, NM. That's rather the heart of where many Native American artisans live, work or do a lot of business. When you hit upon an incredible old pawn piece...it can be INCREDIBLE in both quality and price.
(Even writing about it gets my juices flowing). 
So if one wants the basic "look", AW pieces, if selected carefully, can blend in or even do the trick. But in regards to the SB squash blossom necklace currently available, all that I personally see is a fashion piece. There is something "off" about the marriage between the necklace and the naja. Of course, they can be worn separately and there are myriad squash blossom designs made (there are classic, quintessential examples but also any variety of details).
But the naja's silverwork paired with the necklace look - TO ME - a bit hodge-podge or piecemeal. Its close but no cigar as they say in the cigar stores (or somewhere cigars are of importance to people). 
For the MONEY and on EZ pay, it can do the trick or give a person that squash blossom "fix". Its not one I would buy as it just looks more fashion than authentic. But again, that's just me.
In fact, I'd have preferred it had been sold just as the necklace portion. I think its more elegant and striking than trying to force that particular naja into the picture.
But a genuine, authentic NATIVE AMERICAN (and not just American) -made piece could start almost twice the price of the AW one. I have pieces which are now worth tens of thousands of dollars.
I once bought a HUUUUUGE Sleeping Beauty cuff for $200 at Santa Fe Indian Market (every August, by the way - a huuuge event) maybe 15 years ago. Today, its value is at $4500 approx.
I KNOW! 
But its Native American and huuuuuuge...and fortunately I was buying up SB when it really was still a true sleeper (of a stone).
Bottom line though as with anything, if you think its worth it to you and you can pay for it...you buy what you love. You'll rarely go wrong. You just don't want to ever be ripped off.
I think AW fills a niche and is quite reasonable for what it is.