Toluca is a former coal mining town that was at its peak in the early 1900s. The mines shut down in the 1920s and Mona's opened in the 1930s. Some of my ancestors worked (and died) in the mines and I still have family in Toluca to this day. I have never lived in Toluca (Chicagoland native), but I visit regularly and will continue to do so for the duration of my life. My great-grandfather was a chicken fryer at Mona's for 30-some years. Though not related to the Bernardi's, some of my family members are close friends with their descendants, many whom are still based in/around Toluca. I've been eating at Mona's since before I was born.
Mona's and Capponi's, though founded by Italian immigrants, do not offer authentic Italian food: it's simple, hearty fare you'd expect in a rural community built around coal mining, farming, and glass bottle factories. Their menus have changed a bit over the years and they do introduce new dishes, but their core offerings have stayed exactly the same. There is a deep love for these restaurants not only in Toluca but, yes--within a sizable radius.
Though I admit the bias I've just described, I'm also a well-rounded foodie who has been living in the Chicago suburbs my entire life. I've eaten at the upscale Next, Sepia, and NAHA; I've had countless other dining experiences at respected mid-scale establishments (Balena, Kinmont, Trenchermen, Publican...) and casual (Antique Taco, Parson's, Big & Little's...). I've brought several Chicagoland-based friends to Toluca over the years and each and every one of them has loved their meals there and thought it to be a special place. I've also made several Chicago area connections who, as it turns out, happen to have been to Mona's on several occasions in their pasts, and every one of them has loved their meals there as well and speak of it fondly. I buy their frozen meat sauce to bring back to Chicagoland for one of my friends who no longer visits Toluca but misses Mona's food and charm.
My family's standbys are the fried chicken, fried fish specials on Friday, and any spaghetti or "ravs" with their famous meat sauce. If you're ordering a salad, Mona's house dressing (a simple vinaigrette) is a given. The salads haven't changed a bit either--yes, just chopped iceberg lettuce with a baby carrot and a single radish. We also enjoy their cocktails at the bar -- a mere $5-6 in comparison to Chicago's! The old-timey ambience at the bar is hard to come by elsewhere. And again, I've been to Aviary, Milk Room, Scofflaw, Billy Sunday, Maria's... The balance between quality/value/charm at Mona's is outstanding. You don't come here looking for fine dining-you come for the entire experience. Drive/walk around a bit and climb the Jumbo to further enhance your experience.
So, that's the insider scoop, for what it's worth. I've been to Cajun Connection as well and would recommend Mona's/Capponi's over Ron's CC any day.