Instruct: Classify Amazon reviews into positive or negative sentiment
Query: not so smooth

I'm not sure if other pen fans out there have noticed this or not, but every Sensa ballpoint pen I own (and sadly I own more than one) has the same incredibly annoying problem. The ink flow is splotchy. Whenever I write there are consistent breaks in the lines. Undoubtedly this is a problem with the "space age" refill, but I find it pretty intolerable. What good is a pen that is comfortable and writes under water when it doesn't write as smoothly as a Bic under normal circumstances?