And personally, converting a wireless router to an AP is only marginally better than using a repeater. The issue is both APs on the wireless network are independent APs so they really don't function as a single logical wireless network. Part of the setup when doing this conversion is to have both APs broadcast the same SSID but on different channels. Now when a wireless client connects, the association algorith is left solely to the wireless client which in many cases is sub-optimal. When the wireless client is next to one AP, yes, no problem, it will connect fine. Problems come in when you start to roam. The selection and association algorithms of wireless clients for roaming as I mentioned is not that great. The other issue is that these independent APs don't work with each other in their RF output. It is possible where one AP's RF output will overwhelm its neighbor AP where the converage area of the two overlap.
For me the best scenario is to purchase a real multi AP unified wireless solution when you need better coverage. There are some lower cost solutions out there from Ubiquiti, Meraki, and Aruba Networks. Even a SonicWall solution can be considered as you can purchase a TZ105W which has a built in AP and is a firewall along with a SonicPoint AP. All SonicWall firewalls have wireless controller capability to allow for a multi AP unified wireless deployment.