If you have been successfully flying 1/2A stuff, than ANY airplane that catches your eye will make a good model to move up with. If you have a decent engine for the Jr. Lightning Streak, and you like the looks, go for it! If you are looking to do the basic aerobatic maneuvers, it will handle that, it pretty tough, easy to build and repair. Just follow the instructions for recommended line size and lengths and such. Keep the plans in good shape, make templates from the kit parts, and build several so you have another one in the hanger ready to go if you crash the first one.
In my opinion, there is no such thing as a bad airplane. It just depends on what you want to do with it. If it is kitted and people are buying it, you can probably figure it's a good design. Some kits get modifications and such to "improve" performance, but that doesn't mean the airplane doesn't have any capabilities in stock form. Just build it straight, pay attention to the small details, and have fun!
Type at you later,
Dan McEntee