I beleive a number of posters here have had to return their Bosch machines because of vibration, whether on the first or second floor. You might try a search of the old posts and see what comes up. The way the house is built is important too, and it can be difficult to know if you will have a problem before you try it. Be sure you can return them if they are a problem.

Samsung is supposed to be good for vibration but they do seem to have other issues (I know - all brands have some issues).

Good luck with your shopping. I am almost at the 4 year mark on my Whirlpool set and have been very happy.

I moved my laundry to the 2nd floor and did a lot of research. I ended up with a Bosch - mostly because they were tried and true, taller and bigger with the controls on top (I am 5-8) and I didn't want pedestals. I thought pedestals would make the machines vibrate more and be less stable. I got them 3 yrs ago before they offered the new water flood control - I had concerns about water damage but haven't had any issues at all. I still love my Bosch!

Momof3kids - do you mind my asking which Bosch you selected?

I did get a Samsung because of it's vibration control feature. I'm not on a second floor but was so afraid about problems with durability that I read about with essentially all other brands that I also installed a second subfloor of 3/4 inch thick plywood over my existing floor. I then used hardyboard with thinset under it and under the new tile I installed. That has been totally sucessful to date. My washer is about 2 years old now. I do have a lot of quibbles about Samsungs design in other ways. Sometimes get pretty frustrated with the instructions and their computr controlled energy saver water rationing expecially.

Had trouble with other aspects of the Samsung washers (not very gentle on soft T-shirts and towels), but neither machine I have tried has had any problems with vibration (though the machine is on the ground floor).