Our stay at Seasing was amazing from start to finish. We arrived early in the morning and our room wasn't ready (but we knew it wouldn't be as check in is after 2pm), but within an hour the lady had upgraded our room and given us the key. The suite was absolutely incredible, clean, tidy and modern with great views. The breakfast buffet was fantastic with a big selection to choose from. And the service from all the reception and hotel staff was a cut above the rest - nothing was too much trouble and they all spoke good English.
The only gripe I have is the rooftop restaurant... We had dinner here one night and the food was horrendously overpriced and very below average. The pizza my husband got looked and tasted like it was a frozen pizza you buy from the supermarket. All up, one appetiser, two mains and two drinks cost 620,000 dong. Usually we wouldn't have minded paying that if the food was actually good, but it really wasn't. We have eaten at other places in Vietnam for half that price and the food has been 10 times better. So my only recommendation if you stay here is don't eat lunch / dinner at the rooftop restaurant, it's a bit of a joke.
Other than that, I can't fault Seasing at all - still deserves 5 stars for everything else though :)