look yourself, click on top Tp-Link Home/Support/third line/Tp.Link Emulators, select 5110 to see 5210 and selext 7210, and you gonna see the dif. or click here...

as issues arise, my best recommendation unplug it for 10 seconds and plug to current every 3 days, it will works flawless

I don't see why disable wi-fi Simon answered on post 2, can't help you with Repeater mode, have never used but the how to here http://www.tp-link.com/en/article/?faqid=151 ignore model tutos are...

use same SSID and same security and passwords, but that would not make a dif. this toys wont let you do roaming, example, with a Iphone, 3 floor home, you are on floor 3, getting signal from a 5110...

1-its normal, there is no dif. 3-yes but with static ip you will only get internet if you add gateway, in your case your gateway is 192.168.0.1, then add dns, you could use Googles dns 8.8.8.8 and...

1-Leave it on 0.0.0.0 or add your gateway, is your routers iP 192.168.0.1 2-Dont use 192.168.1.254'its out of your subnet 3-yes you should receive sígnal from wifi and trasfer it vía lan, as long as...