@MartinS It looks pretty solid to me! good work!
If you don't mind, I have a few suggestions.
First of all I like the first image the best, by far!
Especially the outdoor area looks great! Only comment would be, try and make it work with a slightly less wide lens. I know it's very standard to do super wide angles in interiors but honestly it more than not distracts and looks like ass on the sides. (see dining table on the left, super skewed).
The 2nd image is nice and clean but I really feel like there is something missing on the left side, the entire weight of the image is on the right, and there is nothing to balance it.. no colour, no items, no features on the left. Also, very unlikely that you will find a kitchen bench that thick, sticking out that far without support? looks odd anyway.
Image 3 is suffering because of the problems from image 2. The kitchen looks unfinished. The left side is great, and the right side not so much, throwing off the balance again. Also consider putting something on the walls in the back on Image 3.
Anyway, just my 2 cents, clean images.. shows that if you have the time, 300-400 passes does look different to 150-200 ;)