Fecals are fairly accurate provided you have a nice sized fresh sample.
Keep in mind that tapeworms very rarely show up on fecals though, although they are quite easy & common to see in person. They resemble rice like pieces, ussually found on the feces, around the dogs rear, soemtimes on bedding & where the dog lays. Tapeworms are also not transmitted from pet to pet, they have to actually injest them to get them. Ussually from fleas or dead rodents. Provided the pet has enough fresh water & food these are the safest types of worms.