I travel a lot and on long flights or train trips, the PS Vita is a super variety and certainly not just for young people or children. If you like whiling away the time with mobile games, definitely should sometimes resort to this handheld. Available games are much better due to the significantly higher performance and there are more full-fledged games.
One disadvantage must be definitely mentioned: The memory card policy of Sony. Sony uses a proprietary memory card format, and these memory cards can be Sony almost weight in gold. This is a distinct disadvantage. But in this set an 8 GB card is included and if you can not be bothered to time having to delete the games from time to have another case, then the first is not a problem. Me personally annoys, so I've just imported a 64GB card from Japan.
It is also recommended to buy a bag to allow the handheld is protected and can be transported great games or accessories (eg headphones).
Who vacillates between PS Vita and 3DS, let me tell you that the Vita is technically better. For the 3DS but there is a larger selection of games. But if you already have a PS3 or PS4 and PS Plus is a member, then the decision should not be difficult, and clearly go towards PS Vita.