It's Nanoweb that I use and they're certainly good strings even if they don't have the ultimate tone of DR strings but it's the longevity of Elixir that clinches it for me. When I used DR strings I paid about £7-8 a set and they lasted 2-3 months if I looked after them carefully with string cleaner/lube. I found a place in America where Elixir strings cost me the same amount (plus slightly higher postage) and they last 4-6 months. That's quite a saving over a number of guitars and a few years.
I tried Dean Markley Blue Steels for just one set. They were a similar price to DR, the tone was good but nothing special over DR or Elixir and snapped in no time at all. Just not worth it sadly.