Review (5/5): This unit handled a deployment in May 2008 and is still operational in September 2011
I purchased this sonicare unit in May 2008 when I deployed to Afghanistan. I decided to take this item over my regular sonicare foreseeing the problems with electrical current and I didn't want to destroy a $60-75 unit. I paid about $28 for this item. I placed this item in a regular ziplock bag in my ruck sack and used it every night with no issues. It probably got banged it quite a bit. I changed batteries no more than 3x. It served me well. I always wiped it dry and stored it in a the ziplock bag. The bottom did chip and it made it difficult to remove the bottom to replace the batteries but that was the only issue. I have noticed that the inside case is starting to rust but it is still operational and still going with no issues. I will definitely buy again...3 years + and still running.
Update - March 2012 - Unit is still going strong. Use it everyday, change the batteries about every 60 days. Best Sonicare, I've ever owned.
Update - July 2013 and still using it everyday!
Update - July 2017, the handle finally died.