There is a pretty recent thread about this product over at Avsim (just do a quick search and you will find it). There you see a few images which clearly illustrate major issues like tiling and low res textures.
I was thinking about buying ELLX airport since it is my home airport, but after seeing these images, I will stay clear of this product and probably will think twice before ever sending some money to JustSim.
I have heard some good things about JustSim in the past. Their products were always overpriced but of decent quality, not perfect, but ok. ELLX on the other hand looks like a quick money grab. Sad, since their PD3 verson wasn‘t really that bad.