The Corel Technical Suite packages CorelDraw (a solid, Illustrator-style graphic design program), with CorelDesigner (a newer, AutoCad-style program for engineers and manufacturers).
Corel has often been used to design catalogs and periodicals in the manufacturing arena, so this allows the Marketing and Engineering teams to play better together. The Engineers can create a technical design which graphic designers can add their marketing materials, all using Corel software. This is presumably easier than exporting something created in AutoCad.
I wouldn't say I dislike anything about it, but I find it odd. Adobe Creative and AutoCad are different programs with different purposes -- so I'm not sure their Corel counterparts need to be packaged together. This seems clearly a "soft" argument for AutoCad users to try Corel Designer (Just like how CorelDraw pitched itself as an Adobe alternative when Adobe started subscription only pricing).
If you just want to do advertising materials, don't buy this. Buy the cheaper CorelDraw Suite, which has most of these programs already included.
If your workplace or school uses 3D modeling, rotoscoping or the like, this is a cheaper option than AutoCad. It's just a weird choice to bundle it with a graphic design suite.
We have it at my workplace, but I don't work in a manufacturing field so we don't use Designer much. I think it would be useful if you have engineers creating visual objects (schematics, 3D designs, etc) that you'll then want to advertise. It's a niche market.