One last word of advice; before you sign any document or contract, get to know something about the people you are dealing with. Find out what the papers say, and what they mean.
A little detective work might save you a lot of money and years of misery, not to mention the anguish of watching your next years of working career come to an end or be blackmailed.
Most reputable companies will be happy to tell you about what they've accomplished and whom they do business with. Follow up on these references and see if they criticise.
Ask someone who works for that company, a friend or check out the company’s profile on internet to get a clear view of what the company is made of. Call the local better business bureau and see if any complaints have been filed against the company and/or if they are considered in good standing.