For the last 2 year I've been using the method I described to you, and I achieved (some) great results.
Would such sentence look better with or without the determiner some?
What would be the difference in meaning or tone, if any?
I remember that omitting some can change the meaning in some situations, like in
I bought (some) books! (telling to his wife upon entering the apartment)
Would imply, with some omitted, "I bought not some other thing(s), but books".