Pros
Rapid growth, interesting tech and generally friendly colleagues are upsides of working at clear. Some good fringe benefits like food and stand up desks.
Cons
Down sides, of which there are plenty, include: Erratic and dictatorial leadership who create an underlying tension in the office (office is noticeably more calm when certain people at the top are out). Constant pressure to rush things into production that aren't ready. Lack of benefits, expensive medical (especially for those with families), no retirement, no equity for most employees, little to no communication by largely invisible HR folks, rigid work schedule which is atypical of most NYC tech companies. Open office environment which is loud, distracting and antithetical to productivity, especially for the concentration needed by developers. There is a sense that many people here are just biding their time until they either put in enough resume time, they get another offer or get fired.