We stayed in one in June and absolutely loved it. We were on the 3rd floor, and yes, they all do face the highway. We heard absolutely no noise at all unless we had the balcony doors open, then it was loud. I'm not sure if it was just that we got used to it, but none of us (there were 6 of us) complained at all. My sister and brother in law were in the room right next door, and they said they didn't notice the noise either. I suppose if one is really sensitive to noise and used to very quiet places, it might bother them, but we have 4 kids and a not-so-quiet household, and we didn't notice any freeway noise at all,lol.
The rooms are very spacious and the kids loved having their "own" room. We loved that it had 2 full bathrooms and 2 tvs, so the kids could relax in their own room and we weren't falling all over eachother. The only thing I could gripe about, and a minor one, is that the main door opens up into the kids room, instead of the parents room. I wish it was the other way around.We always left the door separating the 2 rooms open anyway, so it really wasn't a big deal. We loved it! I do wish it was a bit closer. Walking to the park in the morning was great, but walking back after an entire day at the park, the hotel seemed miles away,lol. But all in all, we really enjoyed our stay and would definately stay again!
