I know the Delta quality from experience, but it will be installed in our shower in Mexico in January.  I made sure the hose had good length and that it was an installment I can do myself without messing with the inside wall or tub spout.  I did a ton of research on various GPM, and this is the max.  Read all the comments from buyers from many websites, which was helpful.  This is what I wanted and I know it will work perfectly in our "American" tub/shower.  The spray is not too wide and the magnetic hand shower with multiple spray pressure is perfect and efficient in keeping it visually and manually SIMPLE!