It ground the coffee ok, but the holding container on top did NOT automatically funnel the coffee beans into the grinder. I had to literally shake the machine while it was grinding to get the beans to go in the grinder.

This is a solid bag for a long weekend trip. Timbuk2 does a nice job of providing lots of pockets to stay organized. I have taken this bag on two trips, one a long-haul flight, and the other a 2-hour train ride and have had no problems carrying it on or fitting into the overhead compartments. It seems durable and is easy to access when stored. My one issue is that the backpack straps seem a bit of an afterthought. The padding is thin, and they dig in to the shoulders after prolonged use. If I could suggest any upgrade it would be to add a chest or waist strap for extra support when wearing the bag. The side-strap is thicker and a little more comfortable. The only other issue, and I'm not sure how I'd solve this, is that the laptop sleeve is a bit thin and so the laptop, when sliding around, can jab into your back. If these small shortcomings could be fixed in their next iteration of the bag it would be perfect. I took this on a 3-day trip and was able to get a suit, shoes, casual clothes, a laptop, and a book into it. It was tight but nice to know it was possible.