The company is rapidly growing, it's growing maybe a bit too fast at times, so once in a while, there are hectic days. Personally, I don't mind it much, because I love it when a lot of things are happening and I have to switch focus from one task to another, but I could see how other may not enjoy it.
Because the company is rapidly growing, sometimes I feel bad to take more than one day off at a time, especially during a particularly busy month, because then my work will be added to someone else's plate and I do not want to stress my colleagues. So I generally choose to try to take only one day of PTO when I need it during a busy month. Just to clarify, this is my personal choice and management is perfectly fine with people taking multiple days off, as long as you tell them in advance. And many of my colleagues have taken a week or two off with no issues from anyone.