they certainly aren't junk, and I'm sure most people on this site would agree with that. I think from a standpoint of a firewood cutter, which I'm sure most new saw buyers are, there are better options at or below the same price as a new MS290/291.
I remember years ago while in college I was home for the holidays. Dad and I went to a local shop to get some new chain for our trusty walmart poulan. The owner of the shop was trying to sell us on a new Echo saw (their farm and ranch version cs-590 I think?). It was above what dad wanted to spend and the shop dealer said "Just think of how much more wood you could cut with this, in a shorter time". I didn't think much of it then, but now that I find myself working from sun up to sun down, what he said is very true. To even the weekend warrior, time is valuable. so a heavy, slower, under powered saw isn't what most people would pick up off the shelf if they knew that there are better saws for just a bit more, or at the same price only in a different color....