I don't really like my new haircut. The upside is that my hair grows quickly.
I'm not crazy about my new hairstyle but the good news is it won't stay like this for long as my hair grows really fast.
1) I don't really like my new haircut. The upside is that my hair grows quickly.
「新しい髪型はあんまり好きじゃないけど、救いは髪が早く伸びることだな。」
upside には「（悪い状況において）良い面」という意味があります。
2) I'm not crazy about my new hairstyle but the good news is it won't stay like this for long as my hair grows really fast.
「新しい髪型は気に入らないけど、私の髪ってすぐ伸びるからこの髪型は少しの間なのが救いかな。」
crazy about で「とても気に入って」
ご参考になれば幸いです！
日本 
