I tried electrum out but it seems like it's GUI is quite confusing. Is there any other alternatives which have custom miner fees or very low fees?
Have to agree with mocacinno... Electrum has one of the better interfaces in my opinion...
Personally, i find electrum's gui to be rather good in the bitcoin world. If you want an SPV HD wallet that's even more new user friendly, multibit HD should do the trick, but this wallet doesn't allow you to change the fee (IIRC)
It does, but probably not to the extent that the OP wants... there is a simple slider that you can move up and down... but it doesn't really give fine grain control (and it is supposed to calculated on a mBTC/KB basis, but in a lot of instances of people having difficulty with MultiBit it always seems to set a fixed fee according to the slider?

)

I think the lowest you can set on the slider is 0.1 mBTC/KB.... which seems to line up with the 10,000 sats that people end up using as a fee when sending from MultiBit HD and getting their transactions stuck... EDIT: turns out the lowest is actually 0.00000 mBTC/KB

the next step up is 0.02500 mBTC/KB or 2500 sats...