It's fine to bold the 1st word in the headings, but keep the rest of the text in the heading the same font size. There's a little too much unnecessary emphasis on the 1st words right now.
I'm not sure that the heading icons are working. They are lost being at the end of the heading and in the same color as the rest of the text. I don't think they hurt the design, but they aren't really adding anything either.
Call to action underline
What's with the first letter underline in the call to action labels? It's unnecessary and distracting. Lose this feature!
Yellow and black are strong, contrasting colors that look good next to each other.
The layout looks good on the 3 column grid. There may even bee a little too much padding between each column.
Pattern in Yellow
Nice, subtle pattern in the yellow.
The yellow background is very strong and it looks extremely odd that it abruptly stops at the bottom of the main image and then starts again toward the bottom. Instead, fade the yellow background to white to maintain the color and pattern, and to soften the edge. You could reverse it for the bottom, but I don't think it's needed at all there. Just the black is sufficient in the footer.
You have 2 different styles for the slider controls (main image and testimonial). Use 1 consistent design.
Be careful not to make an "oreo" effect, where all content is 'stuck' between two walls... make sure to distinguish the header from the footer, perhaps with the use of similar but lighter hues of yellow and black.
The use of colors is great! Yellow and black are very strong colors, but their use here is very good. You might want to try fading the yellow block to white, instead of just cutting it off, just to see if it lightens a bit more.
I like your design very much; it's bold, yet somehow it does not torture my eyes. Very good use of colors and patterns. Be careful with the "oreo" effect, don't crush your content between two walls. Overall, very good design.