People throw these kind of comments around all the time and it always makes me chuckle. Ten million of this, fifty plus years of that. Truth is, the reputation of the 870 comes from the Wingmaster, not the Express. That is the point of this thread after all.
If there are ten million, it's eight million Wingmasters and two million Expresses. Also, Expresses don't enjoy fifty plus years, they've only been around since the mid-late eighties. The Sportsman model they replaced in 1986 were better quality than the Express, some say even better than today's Wingmaster! So from 1951 to 1984 it was only top quality Wingmasters!
You pay an extra $300 for a Wingmaster because of it's quality and workmanship over it's cheapened brother. You could no more sing the praises of the Express as a 50 year proven design than you could say, the Winchester 1300 versus the Model 12 or an early 90s Win94 versus a pre-64 model. With so many cut corners and compromises to cut costs, the description should read "based on the 870 platform".
I'm not trying to bash the Express but Remington separated the 870 line for a reason. A solid truck gun and beater it is, but not an heirloom or a replacement for a police model.