Well I don't know about Selina, but reading this thread I'm finding out great information about a few home inspectors in the Chicagoland area.
Personally, I like the home inspectors that either bring a computer along for the inspection or email the full report to the client later that day or the day following the inspection. Time being a factor on home inspection clauses, it's vital to get a thorough, legible report as soon as possible once the inspection is done. The computer generated or emailed format makes things much easier when it comes time for the report to get to the attorneys.
There are some nifty tools that home inspectors carry in their goodie bags. One that I like is the moisture meter, especially if you're buying a home that's been sitting vacant for awhile. I also like the idea of the digital camera so that the inspector can add a photo of items that are of concern. Problems sometimes arise after inspections when the attorneys (who were not there for the inspection) don't comprehend what the inspector was saying, and ask for repairs that have no relation to the actual issue. Photos often solve that problem.
You can verify that the home inspector holds a license in good standing by looking them up on this page.
Just select Home Inspector in the profession bar and enter last name. It will also tell you if the inspector's license has ever been disciplined by the State.
You can also check the BBB for any complaints against a particular home inspector. Google the inspector/inspection company name to see if there are any other consumer complaints.
Check in with friends and family who may have recently purchased to see if they felt their inspector did a good job.
I would also like to mention to you, Selina...that a home inspection isn't the time for you to invite family and friends to come see your new house. It's a time you should be focused on the inspector, and the property, and paying attention to what you're seeing and being told. Likewise - if you've got little ones, get a sitter rather than bring them along. Kids get reeeeeeeeeeeely bored at home inspections and that will distract you, too.