Here are a few suggestions for describing good gifts: amazing (increíble) wonderful (maravilloso) thoughtful (considerado) generous (generoso) creative (creativo) And here's some for describing bad gifts: useless (inútil) distasteful (desagradable) cheap (barato) thoughtless (sin pensar, irreflexivo) I hope this helps.

"Wow, this is so unique! I have never seen anything like this before!" "Now that is something you don't see everyday, thank you, it is really something special!" "Wow, this is fantastic! What an interesting piece! Is that what you mean?