Question : Problem: Wireless Repeater or Access points

A friend of mine lives in a large house.  The set up his wirless network using access points.  He has a Linksys wireless N router connected to 2 Linksys POE Access Points.  While trying to connect to his network I saw that he has 3 access points, the router and 2 other access points.  When moving from room to room in the house the internet connection becomes very slow depending what room I enter.  When I check which Access Point I am connected to I noticed I am not connected to the AP with the strongest signal.  I told him he should have used a wireless repeater instead of the access points.  He disagrees.  

Can you please help settle this friendly arguement?

Answer : Problem: Wireless Repeater or Access points

This range expander will work with the router.

http://www.linksys.com/servlet/Satellite?c=L_Product_C2&childpagename=US/Layout&cid=1130267578138&pagename=Linksys/Common/VisitorWrapper