I bought this bag for a holiday trip, when I realised that my main bag was going to be too big and too heavy to lug onto the aeroplane. The bag is well made and holds my Canon 400D with the 18-55 IS zoom, fitted and the 55-250 IS zoom in one of the internal padded pockets and a Canon 430EX flash or my Panasonic HD video camcorder in the other.
There are zipped compartments in the top and a front zipped pocket to filters, compact flash and SD cards, etc. I even managed to fit two chargers and a power cord in as well.
The bag also takes Tamrac's MAS accessories and I added two additional pouches for an additional lens and the flashgun, keeping the video in the case. As the pouches are easily removed or added,there's not that feeling of always being weighed down by a large bag, but gives the ability to convert it to one if necessary.
I love it - highly recommended.