You'll find it pretty good for the small aperture. It's amazing how many objects a 25 mm will pick out.it has the advantage over a 25mm monocular in that you can change the eyepieces. On the dso's I mainly used the 15mm on planets the 9mm.you don't really need a finder as the field of view is wide on the 15mm and you can centre the objects in that then change to the 9mm,although I might try and fit a look through 1x finder by glueing one on.

 

Google pocket Borg telescope and it comes up with a review of it.it's made in Japan and sold there as the pencil Borg so I'll I can say is that they must have big pencils in Japan! The review claims that it does do deep sky but I suspected otherwise based on things I'd seen using a high quality 25mm monocular and sure enough I ended up seeing about 20 dso's even in June when it never gets truly dark.it'll be interesting to see if it'll pull out m1 later in the year I can never be certain of seeing that one in the 25mm monocular but think it is just visible in my 42mm monocular it's visible and m57 the ring nebula replaces m1 as the I think I can see it object.