I am considering the option between using direct exchange connections vs using a vendor like Bloomberg for market data. I am interested in daily data and potentially tick by tickdata. Initially I am fine with delayed (tick data) but with the option to have realtime data in the future.
Other than not having to develop multiple connections to exchanges are there any other advantages of using a single provider for market data ? My concerns are things like the accuracy and the completeness of data. For eg will there be a lot of daily routine work involved in cleaning or correcting data with direct exchange data oppose to data vendors ?
Any advice would be much appreciated.