As a current student there, I would say it all depends on what your career goals are. If you want to be an airline pilot, yes it will probably pay off in the long run, but it is a very slow training curriculum compared to other part 61 schools. It is part 141 and requires less hours to get your certificates, but you will probably end up needing more hours anyway, barely anyone completes their training with the 141 minimums.
There are also two stage checks, one halfway between your training, and one at the end, both including a oral and flight exam with an assistant chief pilot, and they hold the standards much higher than any other DPE would. Then there is still the actual check ride even after the stage checks. So a total of 3 orals, 3 flight exams, and 1 written test per certificate, not to mention the ground school class which must be passed above 70%, which in my opinion does not help students retain any information useful to what students would expect during their flight lessons.
The C172s are nice and less than 15 years old. especially the C172 G1000 for instrument training, but commercial training is not the best in 40 year old C182RGs. It has way too much power for training and is so unpredictable, especially in for power-off 180s. There is one Piper Arrow which is more ideal, but when it's down for maintenance, your training is dead stopped. Each dual instruction flight lesson in a G1000 172 is going to cost you around $250 for a one hour flight, and around $270 for an hour 182 flight.
Because it is a 141 school, and in the Chicago area, flight lessons are often cancelled due to what they consider "high winds". Many people use the excuse "well this will make you a better pilot in judgement because you'll know how to make a no-no go decision better". Total crap. You get through all your ratings and certificates and never have flown in more than 20kts of wind or actual IFR, making you an even less experienced pilot I think, not suited for the real world. This is not totally the school's fault, but it has to do a lot with their insurance policy.
Juggling flight training with taking 15 credit hours of classes (aviation related and gen eds) just does not work well, and this is the biggest problem I've seen. Topple up to three hours of homework every night staying on track with your flying is difficult. Students only get 3 reserved block times to fly a week, that's it. And in the winter, you can go literally three months without flying, then get back in the airplane after that and have to relearn everything.
Because of this, there are students going into junior year who have NOT completed their private pilot license. By junior year, you should be starting training for commercial. In some cases it can be the student's fault, but much of it falls under for the reasons as stated above, just a slow training curriculum. There is approximately 100 students that start their flight training freshman year, and about less than 10 graduate their senior year with their private, instrument, commercial, and multi-engine, the minimum required for the 4 year degree.
Now I know a lot of this sounds discouraging, but there are still some good reasons to choose Lewis. If you really stay on top of your flight training, put 100% in and really apply yourself, get lucky with good weather throughout your 4 years, and have a natural ability to pick up flying concepts quickly, you will probably do well. And then you will qualify for a restricted ATP certificate with only 1000hrs of TT, vs. the 1,500 hrs required for non 141 students. I wish I had applied myself more freshman year. I came in freshman year with my private (which they do accept), but fumbled with instrument for a year, and now fumbling with commercial too, mostly because I hate the 182. If I had to do it all over again, I would do my training at a different 141 flight such as ATP or Aerosim, that doesn't require you to take other gen eds, etc, and allows you to focus 100% on your flying. Now it's all up to you in the end. I'm not trying to discourage you from Lewis, and as I mentioned it is doable, and many have done it before, but I'm just letting you know what I've seen over the past two years that I've been there.