Pressure Side cleaners are extremely effective.

Pressure Side cleaners are extremely effective. They have a large debris opening and a large bag on top for debris. They can clean a large poolin 2-  3 hours or less. The drawbacks are that

they need a  separate booster pump in stalledand a dedicated  return line.  So usually Pressure Cleaners are  installed when the pool is constructed or  remodeled.I have several pool automatic cleaner on my pool route and they leave the pools spotless each week. If  you  are having your pool built or remodeled maybe consider a Pressure Cleaner.The Return Side cleaner is a great option if you  have a newer pool with 1 1/2" threaded return  lines. This cleaner connects right into your existing  return lines and works much like a Pressure cleaner  with the exception that no booster pump is needed. Robotic automatic pool cleaners I have these on several accounts and love them.