It was a tad bit intimidating to me when I first hooked it up. After using it a few times, I can tell you that it is very simple. The book is very accurate on all settings...so no calibrations were needed for me. I haven't used, nor plan on using, the native grass box, so I wish I didn't add that option. The main and small seed boxes are all I use. I was told to keep it clean and greased and she will last forever. I love mine so far. Planted all of my summer plots and switchgrass screens in June and just planted all of my fall plots 2 weeks ago. Pretty nice having my tiller, drag and cultipacker collecting dust! Hopefully, I will be drastically cutting back on herbicides too.