First thing to mention is about the installation,it is that easy to do  no extra tools required .This convertible sofa  can be use with armrest or without arm rest.
This can be laid flat and can be used as bed for an unexpected visit of friends or guest or in a small apartment space.This is so wonderful with one sofa with multiple features.Easy to adjust the armrest even kids can do with no help.This is so helpful during day time just raise one arm rest and use as pillow for quick nap.This sofa is great fit for my new apartment.