i bought a new mega tech skyliner is 2 acers enough space to fly it? can list the pros and cons of it? also i found it on two web sites (limnet.com and skymall.com) and one said the flying time is aproximitly 5-6 minutes and the other said it was about 18-20 minutes. so now im confused how long the batterys last. do you have any tips on flying it?