Edit!!!: Well, turns out I got this all wrong, but the link in the OP doesn't actually link to said preamp.
Here's the real link to the product on Hotone's home page: B Station_Hotone
And from the YouTube demos I have watched it does indeed seem to be amazing value for the money.
Original post by me:
I was aware of the existence of the Hotone Xtomp pedals, but never really looked further into it.
This actually seems like an amazing multi effect, and for relatively little money considering the quality of the models available.
A fair share of bass amp models available too.
Not the best multi effect pedal if you need to change effects a lot on the fly though, but for using it as just one effect or one amp modeler of your choice, and then perhaps change your choice up once in while via the app on your computer or phone, it seems no short of amazing.
I actually consider buying the Mini version, which as far as I can tell only differs from the bigger version by being smaller and cheaper, same emulation engine, same effects available, some amount of physical controls, and stereo in and out jack sockets too, just like the bigger more expensive version.
Might be the bigger version is able to store more effects though, but as far as I can tell that doesn't seem to be the case, and since it is a bit circumstantial to change effects on the fly without having to connect it to your computer first and use the app, I can't see it being much of an issue anyway in case that this is how it is.
I'd personally most likely use it exclusively for amp modeling anyway, and would likely just chose one permanent favorite amp model to have on all the time, with set and forget it settings (likely I would end up using the Mesa Boogie Bass 400 model with it's matching 4x10" cab emulation).
The Mini version is only ever so slightly more expensive than their Binary series of pedals, and offers more bass amp models to chose from the Hotone Binary Amp pedal.