I have been using this device for a week now. And Its a worth for money product from Huawei. Previously I was using teracom data card provided by MTNL. But when I started using the same MTNL sim with E303C, Its completely different experience in terms of Speed, stability of speed, signal strengths and reliability. In fact, I haven’t had any disconnection till now :)
Also it takes very little time while connecting. And a bonus feature which is not mentioned anywhere is, it can make your laptop a wifi router. Yes, you can update your mobile partner software (Device Software Interface) from the recent version from Huawei official website and then your laptop will act as wifi hotspot on just a button click and can connect upto 5 devices. I found this feature amazing. Plus, after updation you will also get Cloud+ feature which will connect you to cloud storage of huawei. Other features are So , I am highly impressed with this and highly recommend it.