I've had bad experiences with Newspaperarchive.com.
It sounded great when I heard about it - Newspaperarchive.com would give me access to a lot of historical newspapers.
But I found that newspaperarchive.com's search capability was terrible.
I think the problem is that newspaperarchive.com does not have clean scans of their documents. Many of the documents seemed to have gibberish in the middle of paragraphs. And when I searched for names that I knew for a fact were in several copies of the Washington post, my search only turned up about 25% of the hits (as compared to a search for the same keywords using the Historical Washington Post on ProQuest).
I was very disillusioned with Newspaperarchive.com.
But what really burned me up was the fact that Newspaperarchive.com covertly kept charging my credit card every 3 months (even though I stopped using their service because it was so poor).
And when I noticed that they had charged my card I told them I was not using their service and asked them to please remove the charge - they refused. They didn't care whether or not I was using their service, they had my money and they weren't giving it back.
Going to the better business bureau didn't help.