Pretty balloons, purchased sample the "M" filled with air, and "SB" filled with helium. Helium filled did not float but it was due to small size, so I may proceed with order of larger.
The balloon colors are very pretty, but they burst easily for me with air pump, they did better with helium. Biggest issue for me was that balloons were pear shaped rather than round, so I did not bother creating the arch.