I bought the iPad mini, I really wanted to like it. It's so thin and light, nice to hold. And the performance still seemed great. But after owning higher DPI devices like the Nexus 7 and iPad 3, I just couldn't get used to how pixelated the low resolution screen looked, how bad fuzzy text was everywhere.
I returned the iPad mini, sold my iPad 3, and bought an iPad 4. It's heavier, but the larger screen is nice for a lot of things too. I have my Kindle Fire HD when I was to read books or just want something smaller and the iPad 4 when I want a larger screen. I think a 7 and 10 (or 9.7) inch tablets work nicely together for different situations.