I run two AP's hard wired to the PoE switch in my closet. These AP's being in the hallways on opposite sides of my home. I run them at lower power so I don't have an excessive amount of RF blasting into neighbor's homes, but I still get good signal quality to/from each AP. Because I now have two AP's running on different channels I've effectively doubled my network throughput overall.
One important thing to think about when planning your WiFi deployment is if you have things that have poor connectivity, everything on that channel suffers. I can have several devices running at several hundred megabits of quality, but a single device being really slow bogs down the channel and suddenly everything else starts getting lots of jitter and overall poor network performance despite most devices having good signal quality. Also, your device may show it has good signal strength but it might be poor quality (bad SNR) so in reality its a poor link speed. Having things physically closer usually results in better average SNR, meaning higher speeds for everything on the channel.
Also, as others have mentioned 5GHz might make it through a wall without a lot of stuff in it, but its not going to penetrate very well through several walls. Having my AP's in the hallways means there's usually only one wall with minimal stuff in it between a device and the AP, so each device usually reports at least several hundred megabits of throughput possible.
One important thing to think about when planning your WiFi deployment is if you have things that have poor connectivity, everything on that channel suffers. I can have several devices running at several hundred megabits of quality, but a single device being really slow bogs down the channel and suddenly everything else starts getting lots of jitter and overall poor network performance despite most devices having good signal quality. Also, your device may show it has good signal strength but it might be poor quality (bad SNR) so in reality its a poor link speed. Having things physically closer usually results in better average SNR, meaning higher speeds for everything on the channel.
Also, as others have mentioned 5GHz might make it through a wall without a lot of stuff in it, but its not going to penetrate very well through several walls. Having my AP's in the hallways means there's usually only one wall with minimal stuff in it between a device and the AP, so each device usually reports at least several hundred megabits of throughput possible.