Cant really coment on the powerflex items yet, i will hopefully be getting a set for my e36 soon. The floflex items i have fitted to my cosworth are great. Cant realy fault the parts. Only problem was afew mistakes with my order.
In saying that, the exhaust mounts i bought from flow flex were poor. Looked like they had not set properly on the mould or wrong mix of materials or something. They had large cracks in them etc. The actuall suspention bushes were good though.
Bruce