WhatA central company SHOULD have the technical and security practices and knowledge on the level of professionals to store your bitcoin.
ProsSecurity in the hands of experts for the incompetent. If users own the private keys, the company cannot disappear with your funds or have them seized.
ConsCosts/ fees, trust in 3rd party, if users don't own the private keys the company can disappear with their bitcoin
RecommendationStore bitcoin you are spending for the day.
*Oct 27, 2016: Bitcoin Core v0.13.1 released. 95% of miner hashing power must upgrade for SegWit activation. | What's New? | Download Update | % blocks mined w/ Segwit | % Running v.0.13.1+