ok.... based on many years experience of land rovers and a few years experience of triumphs....
The BEST bushes for suspension are a good brand of poly, BUT they are only a bit better than OE quality rubber parts. There's the hitch.... OE quality, which you just can't get for most applications these days. Following far behind in terms of quality are standard modern bushes and the worst of the worst are eBay special nasty brand poly.
Provided I can afford it I only fit Superflex (triumph) or SuperPro (land rover)
Polybush are ok from what I understand, but I wouldn't touch any other brand of poly.
Just my humble opinion - your mileage may vary!