There is a similar poll in the Kindle forum about the PW. I was surprised to see that the poll has returned similar results to this poll. Over 30% of respondents have had cause to return their PWs. Two thirds of that 30% returned them more than once. I was less surprised to see a number of PW owners denying the validity of the poll. Lol. The kobo screen looks to be the safest bet at the moment.
On another note, I picked up a simple touch in the sales and plan to root it and use it as a low-power tablet and reader. It's a nice device though I'm not impressed with the page-turn buttons. I find them very stiff and don't work well with the case. I'm not surprised Nook are getting out of the hardware business. It's a shame. Nook did a lot right with their devices, but let themselves down in places. If the Glo didn't have the faults, I would have bought one. The end of the Nook line is sad news