Having a separate sub-net established by he router is a start. But some of the routers have security weaknesses - going with a router cascade to establish the sub-net protects your important data at least from the script kiddies trying out mass searches for newfound router vulnerabilities as only the "public" router is accessible at first.

>My home router has three bands, one for "Guests". I can use the other two and not have problems with my guests.
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>Also, external antennas are better than internal, giving stronger signals. I've heard really good stuff from people I know about this one. http://www.amazon.com/dp/B00YY3XSSA/ref=wl_it_dp_o_pd_nS_ttl?_encoding=UTF8&colid=R7MN2XOU4UIX&coliid=I1M87WTCN49TXR&psc=1
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>>Maybe it depends on where the bottleneck is?
>>I've got an additional router which I use for Wifi connections for 'non-business' use around the house. That means I've got sole use of the Wifi connection to the main router and no-one can overload the Wifi on that one.
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>>>If they are there often, you may want to consider buying a better router.
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>>>>As long as this is a temporary state, I am ok. I love my kids but when they are home I have to consider/think of every word I can or cannot say. Now I have to control my internet habits too :)