The Infinity Rebel 50 has a fairly low suction power (only 250 Watts) compared to most of the other similar spec vacuums that came out around the same time as this vacuum cleaner. Across all the vacuum cleaners of this type and age the suction powers range from 170W to 2,100W, and the average suction power is 430W.
Other 250W suction power vacuum cleaners currently available which you might want to consider include because of its better review score, the Dyson DC29.
If you are looking for a higher suction power then you might want to look at the Grundig VCC 4950 C (£82.14) (260W).
What does "suction power" mean?