These steps arrived quickly and I'm fairly happy with them.  They are plenty high... a little too high for lower beds (i.e. traditional hollywood-style bedframes).  I recommend purchasing the smaller size for lower beds.  My only issue is that they are slightly challenging to collapse for under bed storage.  I think the mechanism may be stiff due to newness.  I'm hoping this becomes easier over time.  They don't wobble and my dog was easily trained to go up and down them.