Your local FBO should always be looked at first and is almost always your best bet for your Private, Commercial and Instrument Rating. Do not get caught up in marketing!

As for you Multi-engine, you may have to get go somewhere.

AriBenAviator.com is my recommendation but there are lots of schools. They have a very competitively priced training package. Check nearby schools first.

CFI, CFI-I, and MEI. Recommend your CFI and CFI-I be done at your local FBO. MEI you will probably have to go somewhere but again look close to home.

As for the most important aspect of a flight school: Your CFI! If you don't bond and enjoy, respect their training technique, you are wasting time and money!

The airlines DO NOT care where you got your training or hours! You are only as good as how hard you trained. Work hard! Learn! Be versatile!