I use bot TTQV and Mapsource.
TTQV is a management tool and has no mapping, all mapping has to be bought in addition to TTQV.
Version 4 of TTQV can use Mapsource maps as well and just about any other form of electronic mapping - comprehensive Irish mapping will only become available when NavTech release it, and then it will be available for both TTQV and Mapsource.
TTQV is vastly superior to Mapsource in working with waypoints, routes, tracks etc as everything is stored in a database which can be manipulated freely - Mapsource uses flat files which are difficult to manipulate - for example, if I wanted to mix waypoints from a number of trips to make a new trip it is easy with TTQV but very time consuming with Mapsource (although it is possible).
TTQV 4 is now available in English as is its manual.
Hope this is of some help.