<girlyscream> Eww! It's all manky! </girlyscream>
No seriously, It's a pretty nasty land raider and I wouldn't want it personally but if that's the kind of stuff you like then who am I to say?
Some nice brush work in some areas and the moisture effect on the tongue makes it look really realistic. Maybe try adding a little bit of drybrushing on the sandy texture areas to give it some more realism. Otherwise it's a good, well painted model