Positives
1. High flow - amazing flow for such a small peace of equipment
2. Small size - Tiny 1/3 the size of a seio of equilent flow rating
3. Low power useage - very low
4. Magnet holder - hides the mount, and means it will never fall of the side of the tank, unlike almost all other brands
5. Easy to modify water direction flow (easy twishing bracket)
6. Looks cool - comes in black
7. Quiet
8. Cost not to expensive
Negatives
1. When sliding the nano along a painted back panel watch for paint chipping, (even with rubber pads installed)
2. The mounting backet cannot be tigthened, (so if the wires are to tight, it can pull the powerhead about, changing current direction)
3. Flow area out of the pump is less than the seio M1100 but, better intake flow makes up of this.
Overall good product
Comparasion to other models I have used
Via Aqua 3/10 rating
Seio (M1100) 6.5/10 rating
Nano (Tunze) 8.5/10 rating