My Tab S2 runs the house. As soon as I get home, I use the S2 for everything. I have the LTE Verizon version, so I can make/receive calls with my cell phone number, all my apps and messages sync perfectly with my phone. My data use the same account, which is great when I travel and I dont have to rely on random wifi or hotspot my phone.
Doing everything I would normally do on my cell phone with the S2 and that big beautiful screen makes it so much better. Especially viewing Instagram, YouTube, or photos.
The thinness and lightness is what really makes all that possible. If it was too heavy and not easy to hold, I wouldn't use it much.
Another nifty benefit is setting up different users, so multiple people in the house can use it with their own settings and accounts. I set up a guest account so when people come over they can use it while not seeing all my messages, webpages, and such.