I get a bag of store brand ground coffee from Aldi's (a crappy grocery store). I then fill my coffee mug (+ a little extra water) and dump it into a tea pot. I heat the tea pot until it starts whistling and then slowly pour it onto the grounds (usually 2 scoops/cup of coffee). Thats it, the coffee is very flavorful, especially when you get the ground/water ratio down for your coffee type of choosing...
I then just rinse some water over the filter thing and the beaker and put it on our drying rack thing (just wash the grounds down the sink - this actually helps with garbage disposal smell believe it or not). I make sure to legit wash it with scrubbing/soap every 2-3 days. All in all it takes about 1 minute to set up, 5 minutes to boil water, 2 minutes to seep through the filter, 1 minute to rinse out. I usually make coffee while eating a bowl of cereal or something.
I think our kit cost like $30, i never have to buy filters ever again nor do I have to deal with the K-cup cost. I used to do the reusable K-cup and just pack my own grounds but the filter was definitely harder to clean (not to mention more fragile) than the chemex filter. AND on top of that with the K-cup you could only make 1 cup at a time (though I understand the nicer K-cup machines can make more). This last week we were brewing 4 cups of coffee at a time with the chemex (we had people staying for thanksgiving) and we still had room to make probably 1 or 2 more. Whether you are brewing 1 cup or 5/6 it takes just about the same amount of time, just a little longer to boil larger volumes of water and seep.
I never even knew this thing existed until my friend (a barista) told me about it. I havent looked back since, I definitely dont plan on using any other method for coffee in the future. Its cheap, reliable, fast, reusable, basically anything I could ask for, especially while in medical school.