Had previously a HTC Rhyme, then S3, but that struck me as too broad. The size, shape and appearance of the S5mini are perfect. You may wonderfully operated with one hand. Otherwise, the battery lasts really long and can be luckily exchanged at Samsung. Some lintels it also has already survived without problems and deficits.
For me, the S5 is currently the best and cheapest mini smartphone for everyday use. There will also be some time stay up to date ... I think with this choice you drive well.