Exchanged mine for a 13" MBA after < 3 days. For what it costs, it's not worth it (for me). It basically functions like a HUMONGOUS iPhone and if you have an iPhone 6 Plus the iPad feels extremely redundant.
Really, it had me thinking why I bothered getting the phone, and if I were to keep the phone why I bothered getting the Tablet. Continuity is nice, but it only exacerbates the issue because then the iPad can totally replace the phone for 95% of what the phone does (usability-wise, but then there's the caveat that you need an iPhone so you feel tied into wasting cash...). I like to see $800+ purchases get full use, so that I can feel like I'm getting my money's worth. I started to feel jipped with the iPad, and I couldn't feel comfortable keeping it.
There was no way I was going to get rid of my i6+, so something had to give.
Also, the Cameras on it weren't all that great, especially if you have an 5S or 6 [Plus]. The difference in quality is kind of amazing and so I would never use them - and it was one of the main selling points of the newer iPad. I use my smart devices to record video for analysis so having the big screen was kind of enticing, but the black bars and the amount of VIBRATION this device does when playing any sort of sound (even ringtones) is just unacceptable. Really, it vibrates like a 10 year old car when playing anything...
So, I took it back and got a 13" MBA, which feels just as portable to me, except typing is amazing and I can run full apps on it. Continuity and Handoff still work flawlessly. I'm liking it, but I'm still keeping my Windows Notebook around to run Video Analysis and Gaming Software (Windows-only).