The suction seems adequate, less than i expected. It currently performs nicely. It's very quiet.

The battery lasts me from 2 - 3 hours at night, pending on how much sun it got that day. Even works in diffused sunlight at times.

With full solar it is 12-15 inches high. Smallest one is perfect for my 12 inch birdbath/water source, hanging on my shepherd's hook right outside my window. In an oversized birdbath.

Unbelievably good bargain. The pricing from this company is the best price by far.

This solar birdbath pumps very little water and that is in very fine steams. The battery charge doesn't last long so once it's shaded, it only pumps for a while. I would gladly pay $50-100 for something of quality that would last.