In short, T2 is not as bad as people may think. It's modern, efficient and somewhat easily accessible, although it is the small 3rd cousin to Dubai's other big terminals. The problem for most people is that T2 is not directly on the metro line and there is no direct link to T1 or T3--nor any information within the terminal to direct you; you'll just be told to take a (costly) taxi.
BUT, the nearest metro stop (Abu Hail) is a very short taxi ride away (10 dhs) and you can even walk to and from it in 15-20 minutes, if not carrying heavy luggage. The terminal itself, recently renovated, has all conveniences--food court, Marhaba and other lounges, duty free--not to mention being fast to get into and out of. In fact, if you are a lucky traveller with free Marhaba lounge access via your credit card, you'll find this Marhaba lounge more comfortable than at the other terminals because fewer people use it and it has separate bar and restaurant areas.
So, if you're on a budget and have to either transfer between terminals or just get into the city, the metro (Green line) is accessible for T2 at Abu Hail station. I had made the mistake of going to T2 when I was supposed to be at T1. I just turned around, walked to the metro and made my way safely to check in at T1 just 40 minutes later.