We purchased two of these in white for our front porch and so far, they are great!  They are relaxing and our two young kids always want to sit in them.  They even have that perfect rocking chair creak!  I think they'll be very durable and they were fairly easy to assemble.  They are comfortable and I've heard Polywood is a reliable brand, so although they are a bit pricey, they are well worth it! 

Pros: Durable, easy to assemble, good selection of colors, reliable brand