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It is very cheap, but on the other hand, it is not a quality product.

It is very cheap; on the other hand, it is not a quality product.

Hi,

Which of the above two sound better to you? Thanks.
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It is very cheap, but on the other hand, it is not a quality product.

It is very cheap; on the other hand, it is not a quality product.

Both are corrrect grammatically, however the meaning in your sentences don't match.

"on the other hand" should be used to give a balance to the first part of the sentence.

It is very cheap, but on the other hand, I'm just going to use it one time. So I will buy it and throw it away.

It's very expensive; on the other hand, I will use it for many years to come.
I'd say leave out but.
CJ
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I think I agree with Susan. Those sentences don't make much sense to me. Anyway, but + on the other hand is not a problem, even though you could certainly say one of them is redundant. It's only a problem for those who don't like redundancy Emotion: wink
Actually, I have to admit I like the version with "but" more.
<<<but + on the other hand is not a problem.... >>>

I think it's not only non-standard English, but it is also ackward sounding.
It's almost like using "although...but together in the same sentence.
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Goodman<<<but + on the other hand is not a problem.... >>>

I think it's not only non-standard English, but it is also ackward sounding.
It's almost like using "although...but together in the same sentence.
Hi,
well, although + but sounds wrong to me too, but but + although would not be the same, and it would be ok, in my opinion.

Just because it is redundant in theory, doesn't mean it sounds wrong or it's not in use. It is basically the same as but anyway(s), redundant in theory, but very common and idiomatic ( ...I don't like math, but anyways, I really don't have any problems with my math teacher, so...)
I tried to search the net for but on the other handto see if there might be some problems for certain people if that was used in a certain register, but I found it everywhere, even in explanations in grammar and style guides on universities' websites. So I don't think it's a problem for anyone, except some people who want to need to follow a certain style in their writing. Emotion: smile
Hmm, you know what? I suspect all this is possible because words like and, but, and so are often considered as universal filler-words, so you'll hear and also or and in addition, which are potentially redundant as well.