I know you always 'get what you pay for', but there are very mixed reviews on these on the link Ad provided.
For example, there's a gent with a 330d M sport BMW (RWD, large engined, torquey car anyone?) that was expecting bad things, but would now recommend them.
I think you could find bad reviews for ANY tyre if you looked. I guess it'll also depend on your driving style, budget and what you use your car for. If I drove everywhere 'giving it the beans' with the occasional track day etc, I would probably rule out the Accellera.
But, I use my car daily, not on a race track and drive to the conditions. When the time comes, I will consider the Accelera, so if you do get some, I'd be interested to see your feedback.
Just my thoughts.