Corel kits are OK, but need some work to catch up to the competition eg Victory models.
Frames are CNC routed, but require a fair bit of work to make parts fit. Metal parts are very hard and brittle - difficult to get to conform to the curves etc on your model.
Timber decorations are pressed from sawdust/mdf type material. Timber quality is good - a lot of it will be 1 and 2mm walnut, which can be more difficult to bend and shape.
Plans - good.
Instructions - could be improved. If you have built a period ship before, they are OK. If not, then a good modelling book will be helpful.
I have completed their Endeavour, and have the Victory kit - been sitting on the back burner for a few years while I work out how to make the decorations fit my model.
Would I buy again? Only if the subject is not available from other manufacturers.