unfortunately, my recent experience was absolutely awful. Bought some big lipos, one failed after 3 mins use, a cell went dead, and took out a brand new esc.
any form of warranty with hobby king (city, same company) is very limited, you have to send product back, and it has to be tracked mail, so it cost 1/2 the price of the lipo, then you wait....and wait.......and wait.
3 weeks later, and LOADS of emails, they finally say the lipo has not arrived, even though I have recorded mail, and it had 1 week previously, then 2 weeks after that, we have your lipo, in "testing queue", and so the saga goes on and on, almost 2 months, they have agreed it was faulty, they will not reimburse or refund, the only option is store credit or exchange (lipo had gone out of stock by now!), no refund of postage, no apology, no reimbursement for the esc , and I am still waiting.
Yes they are cheap, but the chinese culture is customer service is dreadful, by their own admission. I also joined their own forum, check that out, its FULL of complaints, missing parts, orders unfulfilled faulty parts etc etc, read the forum, and make up your own mind.
I could have bought from UK via Ebay the same lipos, it would have cost £20 more, on an £80 order, I would have had paypal and ebay buyers protection, and would have thought a better service from UK, I bought cheap, and got a cheap nasty service, it was only through persistance, several emails every day for thrwee weeks that finally got a result,
GOOD LUCK!