I am a cotton breeder and my views on macro evolution are not positive. For example, cultivated cotton, Gossypium hirsutum, is a tetraploid (4 sets of 13 chromosomes) and another species, Gossypium longicalyx, is a diploid that has a gene for resistance to a nematode (microscopic worm) pest of cotton. These 2 species are related, meaning genetically similar, but they are sexually incompatible. A university in Belgium has gone through highly specific scientific methods and a lot of effort to transfer this gene into cotton as detailed in this paper
http://wcrc.confex.com/wcrc/2007/techprogram/P1190.HTM . Given the extreme difficulty that they had in successfully breeding this gene into cotton, I believe that the probabilty of this happening naturally through evolutionary principles is in fact zero despite the obvious advantage of having resistance to this pest. This is a simple example of impossibility of natural transferring of a single gene from one related plant species to another.
Another extreme example is modern genetic engineering whereby scientists have taken a gene from a bacteria, Bacillus thuringensis, that produces an insecticidal toxin and reverse engineered it into corn and cotton plants such that the plant expresses a bacterial gene. There is, again, zero probability of this ever having occured naturally without an intelligent being directing the process.
I believe in Allah as our Creator and I believe He likewise created all living and extinct species of life. Now, by what means was taken to create the different species doesn't really matter to me whether it was instantaneous or over millions of years I still believe that it required a Creator. I am aware of the complexity of genetics down to the molecular level and the process by which a sperm and egg unite resulting ultimately in a new individual is nothing short of miraculous to me. If one looks at it from an individual perspective we are living examples of so-called evolution as we started off as 2 unicellular entities that joined and went through an amazing transformation to yield a new sexually potent individual within merely 12-14 years. My strongest belief is that the system of life, and the various species of life down to the most minute bacteria, is too complicated to have arisen by mere chance.