I wouldn't trust the guys at a Midas to tell me what time it is....
Look where you park the vehicle... if you have any substantial leaks you'll see fresh stains. Peek under the vehicle yourself and look for "wet spots" due to fluid leakage.
If you don't know of a reputable shop to get a 2nd opinion take it to the dealer and ask them to look at it. All else fails, they will know if anything is wrong and tell you what is (or isn't) covered under warranty. If you tell them what Midas told you they will probably at least look at it for little / no cost.
1998 XJ - built for offroading
2007 WK CRD - DashHawk, for towing the XJ