Underwhelming benefits - plans regulalry get more expensive with less coverage. Employer does pay part of premiums, however. It is hard to expect something like 100% employer paid premiums for a company this size, but we've also had 3-4 different providers in the last year or two with the plans getting pricer with less benefits each time we change providers.
It's easy to become inundated with work - there's no shortage of work to do and often times it can be overwhelming if you don't know how to manage your time (sometimes its still overwhelming regardless of time management). Some support teams have much more work than others. For the most part, work/life balance seems attainable. I've referred friends for engineering roles and they've allegedly been told during the invterview process that work/life balance is minimal or nonexistent, but your mileage may vary. This all does not seem atypical of startups, but it is very much a con if you expect otherwise going in to the company.
No 401k match.
Unlimited PTO switched to accured PTO for customer support as a result of being hourly. Management tried to spin this as better for us as it would encourage us to use the time that we accure. Additionally, it was explained that most people with UPTO don't use it. However, the rest of the company continues to benefit from UPTO and support was given a one-time advance of accured time off. The change itself would have been okay if there wasn't an attempt to convince us that is a much better benefit for us than UPTO.