I wanted to improve my landscape photography and having read a feature on landscapes I resolved to purchase a polorising filter. The Hoya Pro 1 Digital PL filter was regarded as the best although more expensive than the standard filters.
Thia was my first time using filters, however, I would recommend this one as it does what it says on the package. On the down side whilst it does enhance colours and reflections you can over compensate for weather and shadows, but this is pilot error. The learning curve is still continuing, but if you want to improve content, enhance colours and improve reflects, then I would recommed this filter for you.