I bought this for my office 6 years ago and am very pleased. Speed is of the essence, since we occasionally have meetings in the conference room where all the coffee is quickly used up -- this puppy beats the pants off of any standard home brewer when it comes to making one pot after the other for coffee-thirsty guests. Also, the coffee is piping hot (much hotter than most drip makers), making for a tasty cup. The thermal carafe could be more effective, but largely keeps the coffee at a reasonable temperature during the time it takes for a pot to disappear in our office -- that last pot of the day can get rather lukewarm, though, after about 45 minutes. I did have a dripping problem with the carafe, but per one of the other reviews here I found that occasional washing of the rim of the carafe and the lid with dish soap took care of that. I understand that Bunn later improved the carafe for both the dripping and the heat retention, but I have the older version.
The biggest problems I've found are (1) finely ground coffee can make it overflow from the filter, making a mess, and (2) heedless employees don't check to make sure the thermal carafe is fully empty before they make the next pot, leading to another mess! We do not use the thermal carafe to fill the coffee maker, as Bunn makes an accessory plastic pitcher for filling (which makes for cleaner water going into the machine, and pours a lot better). The filling pitcher is worth the $5 or so investment. We use this machine with Peet's coffee, and have the store grind it at 13 (which is coarse on their machines), which seems to have taken care of the overflowing issue referenced in (1), above. A 1 Cup measuring spoon is perfect for a whole pot, and a 1/2 cup measuring spoon for a half pot. Also, I found that it was very important to use Bunn filters to prevent overflowing at the filter.
After 6 years of continuous use at our office, making 3+ pots per day, the Bunn developed a leak. Research on the web led me to find out that the plastic water "tray" which funnels water into the heating tank, can become brittle and crack over time, in one specific place (where the tray joins with the heating tank). I emailed Bunn about it, and they immediately mailed me a repair kit with instructions. They also offer the option of trading in my out-of-warranty machine for a new one at a discounted price ($107, shipping included). This is way better customer service than you'll ever see from other major brands.
I have repaired the machine and it is working fine, but the brittle plastic issue made me think about purchasing the metal commercial equivalent of this unit -- the A10. It should be arriving next week, at which point I might bring this unit home, where it will lead a more sedentary life...