My eco-system was (and indeed primarily is) Apple and I'm coming to this unit from a 2 year old iPhone 4s which I was very happy with. Yes I did consider the 5s and have had one in my grubby mits many times at the local Apple Store. Smartphones are a way of life now, and although the iPhone re-ignited my somewhat lapsed interests in music and photography, those have also grown to now include writing and my desire to carry a journal which could be hand-written to privately. This is the point where a new iPhone sadly fell of my shopping list.
The standards set by the iPhone in music playback and photography are comfortably matched by the Note 3 in my opinion. Getting music onto the phone from my iTunes library is certainly fiddlier, but by no means a challenge. Likewise iPhoto on my Mac recognises and loads photo and video from the Note 3. I am very happy with the results. The move to Android was painless.
Its difficult to know where to start though with the S-Pen capabilities though. The handwriting recognition somewhat defies belief and Samsung developers are clearly taking the S-software line very seriously indeed. The supplied apps suit my needs perfectly and a massive / unexpected bonus was the integration with Evernote (and free upgrade to Evernote Premium). Now thats just taking it too far :)
There are plethora of Note 3 web reviews micro analysing pixel density, processor speed and yes the over-hyped-beyond-belief region lock ( funnily enough, I don't spend my working life globe trotting with suitcase full of sim cards). I'm not going there, it sounds great, imaging is excellent and the unit's design is sublime. I have not regretted my purchase one bit.
This phone is not a fashion item and its not trying to be. If all you need from a smartphone is voice/txt/web/mail and a logo to show show off, look elsewhere. If however you make a living (or aspire to) from creative pursuits, are intrigued by how the incredible S-Pen technology may suit your work/study/play, then this smartphone is an absolute must-try.
Update 28/11 ========= I just though I'd add a footnote ... having tried a few cases; I've settled on an excellent Otterbox Commuter. Top quality protection and it gives the Note 3 a cool industrial look / feel.