I got it dirt cheap using a price match, included 5y warranty. Will see if they replace or fix it... But overall very happy with my purchase.
Replaced the battery once with a higher capacity one; does a great job, can go for hours, always love the result. Bit noisy, so best to run when out.
You have to look after it by cleaning the rollers and dust bin etc, but yeah, it's a very solid build.
Mate has the new one and it creates a spookily accurate floorplan. Pretty cool to see the advancements made.
I admire its design - it's a fairly simple machine that gets most everything right, including climbing carpet, being fairly quiet, not bumping hard into furniture, not falling off steps, and even returning to its charging base (on command or when battery is low after a couple hours work).
It does not have fancy magnetic barriers to close off areas, but a simple door draft stopper pillow on the floor holds it off well enough.
This one: https://www.gearbest.com/smart-home/pp_187246.html
Turns out it's a few weeks short of 2 years old now, and it's still going strong. (It's kinda slow to charge, but at least thats kind to the batteries.)
It works fine for me - and I've had friends who've got real Roombas who say theirs doesn't work as well. I _think_ you sometimes get lucky with the wheels/traction and your particular carpet - mine does it's least-good job in the most rarely used room (spare bedroom) where the carpet is fluffier. It occasionally gets "trapped" in there. But I probably wouldn't have ever pulled the trigger at a $600 pricepoint.