he sounds fine =) lots of words.
one thing i will say though is follow your instincts, my son was starting to say quite a few words then everything stopped. when we got his ears checked by a specialist he actually needed grommets and now has quite a few words for a 16mth old and is starting to put two word sentences together. i think thats because he spends a lot of time with his 3yo sister though. we saw other developmental signs too though like he would try to stand up and lose balance easily, not hear us when he wasnt looking at us, and had ear infections as well.. just thought id put that in there, cant hurt to get his ears checked if your worried but other than that sounds all good =)