It's the first time I buy bobo balloons and I didn't know what to expect. I followed the instructions, but was afraid to over stretch. When I inflated the balloons the shape seemed lapsided. I reached out to seller for help. They responded immediately. The seller said to stretch the balloons as much as possible, they also sent a helpful video tutorial and even sent some replacements. After practice and stretching the balloons they turned out beautiful! I used them for a gender reveal and everyone loved them, specially the kids.