Yes, it works great - the half-life of suspension is measured in hours. It will cause some bloating, but arimidex will fix that. I usually start with suspension and anadrol, while the prop/cyp product I like reaches serum concentration levels.
Stick to the glutes with the suspension, or lifting can be difficult. Since suspension is water-based, some argue that it can be taken orally, like winstrol, but I have always just sucked it up and injected....20 days is plenty - 20ml vial at 1ml a day.