There are definitely pros and cons.
I like the fact that all the bounces and rolls are true. There are no holes, dead grass spots, and such.
I've also played and coached at fields that aren't that good. A couple have had some rolls on them. Others have had 'dead' spots where there's more black rubber than turf. Also when the sun is beating down they become really hot! Also have seen a couple where they chose to put in turf that just wasn't that good (really rough, sparse)
The ones that are put in correctly and with good turf seem to be nice to have though.