I grew them last year from Sutton's plants. I rated them highly - I'd say about 8 out of 10, which surprised me. I do always pick my tomatoes when they're fully ripe, don't like them firm and orange. I was expecting them to taste rubbish (and I do grow around 10-15 varieties each year).
Our allotments get blight every year without fail too. These cropped into late October and one plot along someone had left an enormous bed of maybe 20 bush tomatoes to rot down freely with blight - that was from August and despite a few infected leaves and right at the end stems mine went on cropping until the frosts hit them, which is a first.
Do try them!
Sadly I bought seeds this year and the packet was defective - not a single one germinated. I asked for a reduction on plants because it was too late to sow again, but they only offered me a refund for the seed packet (not even for the postage too). Very poor response in my opinion.