What is life in Philly like?
I think it's great, but it also depends on what you're specifically looking for out of a city experience.
The amount of culture, food, beer, history, art, green space, and amenities you're going to get here in the framework of what you're going to pay for rent is simply unparalleled. I moved to Philly six years ago after college, and seriously just worked in a restaurant 4 nights/week and had no problem paying my $400/mo rent (my rent was so cheap because I went a few blocks outside a "hot" neighborhood, but could still walk to its borders in three minutes). I could use time I wasn't required to work to sack away rent to explore and take in everything the city had to offer (and spend plenty of time looking for a full-time with no pressure). I felt like I was in on some big secret that no one knew about, or something. The amount of value you get per rent dollar spent is an incredible ration. Like, the fact I could try a locally roasted delicious coffee and pick up a (relatively) amazing sandwich for under $12 and each within a few blocks from my house blew my mind, as someone who grew up in the 'burbs and drove 15 minutes to anything decent. In addition, it's not just that; most things you want, including mostly any community you want to be a part of can be found here, and for cheap, and a subway or bus will take you there. It's just a bevy of urban density with tons of options to explore on all levels.
The bad? I'd say typical big city problems; crime, litter, people begging for money. I honestly don't have many big complaints about Philadelphia except for one (and yes, it's food related): its lack of options past 2 am. There's simply nothing open when the bars shut down, including transportation most nights. I wish there were a backdrop of a series of gritty diners, at least. There's just nothing, and if there is, it's very few and far between. The places that are open are madhouses. This may not be of interest to you if you don't like going out.