I have literally put about 20 of these buggers together, love them.
Have had the original ones for 12 years, collapsed them down 3 times for house moves, reassembled blindfolded easily. Sturdy, strong and put up with a lot of abuse. The doors are nexus so solid and not at all flimsy.
You buy the frame, the doors, handles, hinges all separate and then fill it with whatever interior fittings you need.
My sons have 2 single wardrobes each, they are held together with the connecting bolts that come with them so that it looks like a double wardrobe. Over the years I have changed the interior fittings in theirs lots as their clothes change.
So, mine are pretty much filled with the plastic tubs, you don't need the wooden drawers unless you aren't putting doors on as no-one sees them. You can adjust the spacing between the tubs so that you can over-fill them if you need to, in a single plastic tub I have a spare single duvet and pillow!
The beauty of the tubs is you can pull them all the way out so can get to stuff at the back really easily. When planning remember to take into consideration the position of the hinges you cannot put a tub right at the top as the door hinge is there, same with the middle. My sons do not have any chest of drawers as it all hides in the wardrobe.
We have hanging rails, tubs and shelves plus the fabric storage cubes that fit in the wardrobes. Try to go for these rather than 2 larger ones otherwise the temptation is to overfill them and they become heavy and we have snapped the fabric handle on one. I know that one says it is 34cm deep but ours are definitely deeper as the wardrobes are 60cm deep.
I also have a 4m run of these in the playroom, it hides the TV and wii (we have a 32 inch tv hidden in a PAX double wardrobe in the master bedroom) plus games, shoes and coats, hoover, ironing board etc. I really wish I worked for Ikea as I would have saved a fortune.