I'm not into Heliz.
I cannot comment on the spec.
But I think you can get those for a better price.
HK is one of my favourites.
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=11646http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=4134It would good to invest in a balance charger if you are serious and plan to stay long in this hobby.
There are lot of threads on the forum related to customs. It would be good to browse them.
If you still do not get your item within 45 days and no correspondence from the PO/customs then you need to panic.
I have got a Tx and Cessna 172 (44") from HK without any issues.
The parcel will reach you house and you need to pay the postman the customs.
In another case I got a letter from customs to furnish the payment mode and invoice.
I paid the customs duty at the local PO and walked away with my parcel.