impressive and expensive
sumptuous - grand
Something regarded as being ‘sumptuous’ is grand in appearance, of superior quality, and often extremely costly. This word implies that the thing in question is highly appealing to the senses and elicits a great deal of enjoyment and admiration.
A sumptuous feast was served at the banquet. Attendees were really taken aback by the scale and quality of it.
I was drawn in by the sumptuousness of the colours the artist used to create the painting. They were so bold and rich that they really caught the eye.
The meeting at the hotel took place in a sumptuously decorated ballroom replete with chandeliers and Persian carpets.