Nice track you have here, the "VOICE-WORK" is really top notch here and could really have a career with this,this was a tad long but it does show off your talents, nice work here.
~~THINGS TO IMPROVE ON~~
Maybe shorten it up just a tad.
This was really good. You have a nice voice.
I love it
Your voice is great, beautiful! I wish I could have the talent you do but sadly I'm only just starting out, maybe you could give me some tips?
Practice, practice, practice! Voiceover is about learning that you will be rejected, and often at that, but that you can never stop trying. Use places like the Voice Acting Club or Voice Acting Alliance to hone your skills with your peers and challenge your boundaries and range.
"How do I voiceover improve" is a very broad question, one I couldn't possibly answer in just 5,000 characters, but you are more than free to add me on Skype or check out those websites I mentioned above and immerse yourself in the community to find out!