not to be completely wrong
The Spanish phrase 'no estar del todo mal' translates to 'not to be completely wrong' in English. In everyday use, it refers to a situation or thing that may not be perfect or right, but also isn't entirely incorrect or bad. This phrase lends itself to subjective situations where there can be multiple perspectives or interpretations.
The book I'm reading is not bad at all
This phrase suggests that while the book is not excellent or mind-blowing, it is still an enjoyable read and not poor by any means. This phrase can be used to describe anything that is above average or satisfactory.
His attitude towards work is not bad at all
Here, the person's attitude towards his work is being remarked upon. While it's not an overly enthusiastic or dedicated attitude, it's not negative either. So, it's considered to be acceptable or decent.
The hotel's facilities are not bad at all
The statement describes the facilities at a hotel. Using the phrase 'no estar del todo mal', it suggests that the facilities are overall acceptable, though they might not be the best or outstanding.