This was the first bong I ever purchased for myself. I chose the 15cm size as it is easy to store away and hide if needed. I found it somewhat harder to pull than a regular size bong but I soon figured out if I leave some of the resin residing around the cone piece when cleaning, it seems to make it a little easier to draw the marijuana through upon heating. I love its compact size and it also delivers a good punch. It's super easy to clean although due to it's tiny dimensions, it does require a cleaning quite often and water changed a lot more than I've experienced using other bongs in the past. I can take it anywhere and it wraps nicely inside a hand towel and its size makes it easy to fit in virtually any bag.