I don't know about Maimonides. I interveiwed at LIJ/North Shore. What do you mean by "opinion"? What do you want to know? They used to be two separate programs that recently merged. Now that they are together, they are a big program (43 or 45 residents per class, I think). The programs are separate hospitals but it is a relatively simple drive between them (on the order of 10 minutes). The area is suburbanish Long Island, which gives it a "nice place to live" feel but it's accessible to NYC (it is not too far out on the Island) and you will see the underserved patients coming in to the clinic and ER, etc. They say that there is usually at least one person in each class who commutes to work from Manhattan (although most live close by to the hospitals). The residents seemed nice and friendly, like most peds programs. Due to a relatively recent combining and also the size not everyone in the class knew each other. Residents seemed pretty happy, although if I recall correctly it is Q4 call for most of the 3 years (no night float or anything). One selling point is that there are basically 4 faculty members who are dedicated to resident education/residency program direction (2 from each institution). They seemed nice and got favorable reviews from the residents about directing education, handling residents' complaints, etc. Graduates of the programs are able to do primary care or fellowships. I think the med students at LIJ are from Albert Einstein, I forget where they are from at North Shore.
Overall my impression of the place was favorable.
