I also bought a cheap Titan chaser when doing our house. We were living in it at the same time.
Aftwr the initial plunge it wasn't too dusty when hooked up to Basil.
As someone else said, the ergonomics of it weren't the best. I ended up marking the centre line of the chase on the front of it, as the joint between the two halves was not in the centre!
Using an SDS alone just ends up with massive chunks of plaster coming off, as happened at the top of each chase where the chaser couldn't reach.
The dust was nothing compared to when I decided to widen the cupboard door in our bedroom with a 9" grinder into the 3" cinder block wall (1960s ex council).
Taped up the door, opened the window and set to it.
I finished the cut, looked down and realised I couldn't see my feet. Turned round and there was just a dim glow from the direction of the window.
I stood there for 5 minutes waiting for the dust to clear and my wife came to check on me as I had stopped moving.
Pushed open the door, quickly closed it again and said "what the hell did you expect"
When I first started decorating, I couldn't afford a dust extractor. I had an Atlas Copco VSSE220 sander with a really rubbish bag on the back. I used to tape myself into the room.
As an aside, last year my mate, Colin the pointer, asked me to cut a line in render between two semi detached properties (he had to remove the render. I had previously purchased a Festool angle grinder which runs on their tracks. The job it was previously purchased for was cancelled. I had to screw the guide rail to the wall and pull it down rather than push it up. It worked very well, and connected to the dust extractor, there was little in the way of dust.

Before owning either the festool or the Titan, I fashioned a MDF box around the blade on my little Dewalt angle grinder and connected it to my dust extractor... it was about 80% effective dust wise.

