Ventajas
I worked at Accelera for a long time and was a huge supporter of the company. In the early days (5 years ago minimum) it was a family company. The owners cared about their employees, you could talk to the owners and management about concerns and they would be addressed. We had top level engineers, we were paid bonuses and although the salary was below average the atmosphere more than made up with it.
Desventajas
Let's see.... they fire employees (2 weeks before Christmas no less) and and they can't replace engineers at the rate people are leaving. While there are good people there most senior people are leaving. Their is more money to be made elsewhere, there is more experience to be gained elsewhere. 401k - Doesn't match, Stock options - Fake and aren't worth anything, don't be fooled. Do yourself a favor and read the reviews, question why some reviews are 1's and others are 5's. Management requires that employees make reviews to raise their ratings because even they know how bad the company is.