I have a similar device made by Ryobi with strimmer, brush cutter and hedge trimmer attachments. It cost a bit more than that, obviously. There may or may not be a significant difference in quality, of course. They might both be the same import from China with different branding. Who knows?
The brush cutter is great for clearing weeds, etc. In fact, it will render virtually any terrain bar a full-on forest down to bare soil in minutes.

I find the hedge trimmer a bit unwieldy on the end of it, TBH. Unless you have sections of hedge for which you need that long a reach, I'd get an electric hedge trimmer next time.
I don't know about the "pruner" (mini chain saw) attachment. I've looked at them but I suspect it'll be the same story as the hedge trimmer. Useful if you need the reach, awkward if you don't.
Overall, probably worth a punt at that price, I think, but if you don't need all the attachments I would go for a simpler strimmer / brush cutter only and then buy the others as stand-alone tools if you need them.