I bought this so I could use it backpacking and at the office. After a week at home with it, I'll not trust it to field use.Most of the other negative reviews point to the same issues I'm having with my "travel press". It doesn't filter properly. It allows grounds past the silicon seal. I've tried every technique I can think of and I still get chewy coffee. I'm thinking if the seal was just a bit thicker and stiffer the mug would work. Bodum tried to save a few pennies and failed on the execution. I wrote to Bodum almost a week ago and still no response. Well, at least I've got an OK coffee mug.EDIT 01 September. The week before I originally wrote this review, I wrote to Bodum informing them of the problem and asking for a response and solution. In the three weeks since, I have not heard back so much as an automated "thank you for your comments". Customer service is everything in my opinion. I'll go elsewhere when I see the Bodum name in future.