I've never worked directly for Exel. I have worked for smaller logistics companies that shared clients with Exel. I currently work for a subsidiary of Exel. Their office environment is pretty thick, a lot of duplication, but they are very aggressive at getting new clients and do their job inside of a competitive budget. It could be just the area I live in (Western Canada), but Exel seems to be growing more than most of the other firms.
They have always seemed to move their middle management around a lot, though. But I think that's just the nature of logistics.