I can't comment on MCON, but I do have experience with Bellarmine. Let me start by saying it is a very high quality program and you will be well prepared to pass the NCLEX. Most of the lecture and clinical instructors are knowledgeable and experienced.
This program is only doable if you have adequate financing to complete it in its entirety. Be very sure that you can do this. As a second degree student, your options may be limited. The class offerings are not flexible, so if you run into a problem you could be waiting a year or more to get back in. The program overall is very tough. I had a pretty rigorous background in my undergrad degree but I had never experienced anything quite like this. You will be sleep deprived preparing for clinicals thoroughly, as well as the hefty courseload with exams each week. There really is no room for mistakes and you can't afford to get behind on reading or assignments. I think their dropout rate is at least 30%. Some of these students will continue through the traditional track, however.
The other factors to consider are family or other responsibilities. There are typically only a handful of people with kids, and for a good reason. You pretty much give up your life for a year to finish this program.
Hopefully, some other current or former students can give you some input as well. Let me know if you can think of any other specific questions.