The rack was easy to fit in about 10 mins, looks like it could hold a smallish mountain, is lightish (not much different to the Blackburn) and really changes the bag position. The result is no more heel catching and a significant improvement in the feel of the bike, particularly when pushing or going slowly. I did balk at the price (£83.00!!) but am really pleased with it now I have it. As a bonus it also has a plate to fit a rear light to which is very useful. I now have a second rear horizontal rear flasher to complement the vertical one on my seatpost and the difference in visibility to traffic is dramatically improved.
I always think you can't be too visible for some motorists and with lots of dark night and early morning commutes over the next few months it will make me feel just that bit safer. I have certainly noticed some traffic giving me slightly more room when overtaking, so that's not a bad thing.
One more step nearer to my dream bike.