OMG, I just did this job and it is not pretty the first time but you swear up and down you will spend way less time the second round. Trickiest part for me was getting that stupid banjo bolt in (took many many tries, prayers, and a lot of patience. The hardline on the other side was a project as well because I kept trying to fit it in the wrong way. The 2 bolts and the hardline should have descent location for fitment, otherwise, it is in wrong. Might be good to take a picture before you start removing. Used basic tools (wrenches, ratchets, pliers, adjustable wrenches. Took me much longer than everyone else because I had to keep repeating things and did so many checks. I purchased the autozone kit for $50. It came with o rings and everything needed. I reused bracket that goes on back of engine, sensor, and the o-ring on the end of the hardline. It wasn't damaged and the ones that came with autozone package seemed too big. Bought the same copper rings from Nissan by mistake, thinking kit wouldn't come with it. In total, $53 (hose), $15 (Nissan PS fluid & copper rings) + 11 hours = $68. Test drive went fine. Will give it a few days but so far so good. Girlfriend helped a lot, I mean a lot. Trying to get everything to fit right, we installed/uninstalled a handful of times.
All the concerns discussed in this and another similar thread are true. This is definitely a doable job, just takes a lot of patience and breaths.
BTW, 2003 Murano SE w/ 103k miles. Did not give any issues, then out of nowhere fluid leaked. Weird enough, it never completely leaked, always stopped way below the line but there was always something in the reservoir.
Funniest moment was people looking at the cowl removed and thinking I was destroying the car. It is really not as scary as it looks, considering its nothing but bolts.
Prayer helped so much, I kid you not.