about sentence patterns

[sariputra]

Dear teachers,

That saves you time and effort.--- (1)
That saves your time and effort.---(2)

With reference to the above two sentences, I would appreciate it if you kindly
answer my questions such as:

1) Which sentence is grammatically acceptable ?
2) If both are grammatically acceptable, which sentence is more advisable
between sentence (1) and (2) ?

Best regards,
Sariputra

[Mister Micawber]

Both are acceptable; #1 is idiomatic.

[sariputra]

Dear Mr. Micawber,

Thank you very much for your kind answer. It was very helpful to me.
I wish you good health and prosperity in all of your businesses.

Sincerely yours,
Sariputra