A cordless vacuum changes your daily routine because you can grab it for a quick spill without plugging anything in. You will likely cut your cleaning time in half since you aren't moving furniture to find an outlet.
Aim to buy during the big sales in July or November when prices on floor care usually drop. Look at at least three different retailers to compare prices before you commit to one model.
The 0% intro APR is a deadline, not a gift. If you still have a balance after 15 months, the lender will charge you interest on the remaining amount, which can get expensive quickly.