We have a wonderful but heavy Dyson. Due to it's size it doesn't get used as often as it should 
. So I was very excited to order a cordless lightweight hoover. However whilst checking I got the best price , I found a bargain roomba style robot hoover and now i'm torn.
Both are under £100 so will only be for basic daily hoovering (esp dropped crumbs) with a full deep clean and floor wash with old Dyson once/twice a week.
Hard floors/tiles throughout with a couple of rugs.
Dh thinks roomba is silly. I am excited about under beds being done. Over to mn jury. 