I have used several home waxing products and find the prepared strips are the most convenient. Completely mess and hassle free, and they do a comparable job to the ol' hot wax method.

You need to chafe the strips to warm up the wax, or you can lay them out in the sun if you're working near a window. If you don't warm up the strip, they are definitely not as effective. They come in duos that you peel apart and use both as quickly as possible after warming them (usually I put them both on right away to different areas). You can also reuse these strips several times in the same session - probably 4 or 5 uses per strip. You need to make sure you warm them thoroughly and press the wax sides together to remove any air bubbles. If you took off a lot of hair, you might not get as many uses.

Sally Hansen offers different sizes for leg, underarm, bikini and face areas, which I sort of pay attention to. I have never used these on my face, but have everywhere else. For some reason, I have very poor luck with underarms no matter what kind of wax I use, but legs and bikini are easier.

These strips have difficulty with really short hairs (true of most DIY waxing products), but otherwise are a solid product I'm happy to recommend.