Having mixed experiences with my Sarissa buildings at the moment.
Plantation / Town House
I will start with the 'challenges':
1) I was having problems inserting the tabs into mating slots - seems there is some variation in the thickness of the MDF so the tabs had to be sanded down.
2) This thickness variation had a knock on effect with the delicate parts for the porch, veranda and window shutters - the laser had not cut all the way through so there was some careful cutting with a scalpel - not always successful.
To be fair to Sarissa they did offer to replace parts that were a problem but I need to have the building on the table for the 23rd Feb so could not wait for replacements.
3) Access to certain areas once assembled - I did leave the first floor veranda off of the supports from the ground floor porch but even then getting a brush in to paint the brickwork is impossible.
The access problem was soon solved as I accidently put the porch supports against my painting table without realising and they broke away

Positives:
They do make up into nice buildings if you take your time and think about how you are going to assemble them.
I am considering painting as much as possible whilst they are unassembled – window shutters and the edges of the parts especially.
Also using a carpentry wood glue rather than any old PVA glue.
I primed the building grey using car primer and went back to using Humbrol enamels as the acrylics were not covering that well.
Graham W