Well, some use them. I do not. The new A123 technology, is more suited to use. They are lighter in weight, and are available in several capacities

But, you can also go to NiMh. I have several now, most 6 volt packs to avoid any issues with low voltage re-boot situations with the digital receivers. With the exception of the two planes with A123 technology, all the others have 6 volt NiMh 1200mah packs. Two planes are equipped with a pair of these in parallel.

So, it's up to you. If you do go with LiPo packs, you will probably need a regulator which adds both cost and complexity. In my opinion, for beginners, and that's what this forum is about, it's best to keep it simple and avoid the regulator route for now.

CGr.