Samsung's Exynos 3 chip performs well and I was able to get a full days usage from the Galaxy S5 Mini relatively easily with moderate usage. That included a couple of hours of Spotify playback
The S5 Mini has a Super AMOLED display measuring 4.5 inches (for comparison, the S5 has a 5.1-inch screen). It's Full HD, meaning 1,280 x 720 pixels, which is perfectly acceptable for a device of this size. The pixel density comes in at a healthy 326 ppi. As with all Samsung displays, it's bright, contrasty, heavy on the saturation and a joy to zMGb.