I don't know if there are any pros and cons. Limited Liability Company, meaning that the owners of the LLC, called members and are protected from some or all liability for acts and debts of the LLC depending on state shield laws which basically means if you screw up on the job they can sue your company but not you personally.
I'm no attorney and laws vary by state, but when I did small business consulting I told folks that I felt the legal protection of an LLC was over rated. I "believe" it can offer more protection for bankruptcy cases and may or may not offer tax benefits, but doesn't always protect you from getting sued. I can sue anyone on here for not liking my post, doesn't mean I'll win, but I can still sue. Depending upon the situation, an attorney may sue you your company, you as an individual, the manufacturer of your equipment, your second grade teacher, etc. He'll try to hit as many pockets as possible.