I bought a refurbished Nikon D3100 in mid-2012 and can honestly say I've never looked back since.
I never thought I would buy a DSLR, but when I suddenly realised that my old camera was crap (Nikon Coolpix L120 bridge camera), I took the plunge.

They're flaming hard to learn at first with settings and menus here, there and everywhere, but once you get the hang of it, they're great.
I like how Dan has mentioned that DSLRs are easy(!), that is still beyond me! I have taken a couple of flukes though, such as:
Go North East 6007 NK11BHL by Northern156, on Flickr
But even that had to be flooded with light!!!

The main thing you'll find with DSLRs is the amount of accessories that you need. Lenses is obviously a big one, but even stuff like remote controls - I just bought one two weeks ago to try and improve my night photography. (Not used it yet though!)
Tripods, lens caps, spare batteries, lens filters, stuff like that.