The XHDATA D-808 is the first world band receiver that I bought and I've been very impressed with it. I was looking for some decent ones online and had initially wanted to buy the Tecsun PL-365; this is because it was compact, which I really liked, and had a supposedly very good reception. However, my attention was directed towards the D-808 as I was told it is an even better receiver than the PL-365 at a cheaper price and whilst I cannot confirm that statement (as I haven't tried the PL-365), the D-808 is, indeed, a great receiver. Using just the in-built antenna, I was able to receive two dozen shortwave stations and a dozen medium wave ones at my apartment. This is very impressive, as there are a large number of people who live at the apartment complex, so there's bound to be a lot of HF interference from neighbours.
It also comes with a long-wire antenna — I have yet to measure how long it is exactly — that you can connect to the external antenna port of the receiver; however, I don't really have anywhere to put it at my apartment, so I will have to try that out someplace else and see if reception can be improved even further using that.
I am, however, slightly annoyed by their usage of 18650 Li-Ion rechargable batteries and would've much preferred them using two AA batteries instead; that way, you would have been able to use the regular AA batteries if your radio ran out of power or buy rechargable ones. With this, if you run out of power and don't have anywhere to charge it, you can't do anything about it. I have also heard some complaints about the radio muting briefly when changing frequencies; and while this is absolutely correct, it actually doesn't bother me at all and I have yet to miss a station because of this. The fine-tuning feature of the radio helps a lot with this as well.
It is also able to receive FM radio broadcasts and Air band communications (I have picked up the ATIS of nearby airports with this very easily) and, one of the best features in my opinion, it has SSB; tuning in SSB was a bit fiddly at first — I hadn't really done much SSB stuff before — but after you get used to it it's absolutely great. I have been able to pick up a large amount of radio amateurs with just the in-built antenna from my apartment.