Pros
Atrenta is still a startup. Hence, there is chance to stand out from the crowd. Plus, you will have the satisfaction of knowing that you are developing something that is useful to semiconductor engineers.
Cons
In recent years the firm has become risk averse. It seems that the management has to show yearly revenue increases to investors. Which means that the work environment now prefers individuals who will tow the line and not rock the boat. If you believe in "if it ain't broken, don't fix it" dictum, then you would fit in in Atrenta. If not, then Atrenta of today could be a bit frustrating. It really is a pity because Atrenta wasn't always like this.