Okay, you asked. I do like the rocks and the gravel has a nice natural look. But why is the filter tube crooked and in the middle of the tank. Move it into a corner so its hidden. And that other little suction cup thingy, do the same thing. And a black background will make your fish get noticed, not the bright blue you see.
Other than that, way to go and I hope it goes well for you.
As Philbe said i would reccommend playing around with the rockwork to try and hide the filter and heater. Go to http://www.malawimayhem.com and check out thier gallery. They have tons of pictures of people's malawi tanks that look great.
not bad for a begginer. a good tip for rocks go to a landscapeing company its realy cheap you can find some cool stuff and fill the whole tank. i bought $20 in lava rock broke it up and filled my tank it looked realy cool. i found some type rock that had crystals in it. its realy cool. becarefull what you buy though because some rocks have metals in them.