I did a vh45 swap last year on my car. It can be expensive, but it can also be cheaper if you can fabricate everything yourself. As for being reliable, I haven't had any issues (yet) but that all varies on if you maintain your car. My advise, if you want a complete plug n play motor swap, this isn't for you. But if you don't mind fabbing a couple parts, figuring out some wiring, ect, you'll have a blast with this motor.
If you wan't a peek at what I did, here's my build thread.
http://www.v8nissans.com/forums/show...ust-spit-on-it