I'm not a pro, but I thought it was alright. I didn't really like the text bits. But I don't like 'em on high-profile movie trailers either. But with the equipment you had available, I think you did a good job. Better than what I would have done at 17. I did some stuff for my Dad's business with a £100 pocket cam 😀. (Audio was scrapped (intentionally), I dubbed it using a Shure SM58 mic, and a firewire audio Interface (oh and a cold 🙁).
BTW I'm British, and I'd just like to say, we spend less money on films but still end up with really good results. We're much smaller than America, so it's not surprising you do good movies / series as you have some many people to choose from and so much money to spend. I like the American film industry. But I don't like some of the American views of the British.