It's my BLOG and I'll cry if I want to

Ok, so I broke down and bought the automatic shower cleaner. With my store having them on sale for $19.99 and a $10.00 off coupon I went for it. I talked with 3 people at work who all have them and love them. I read a few blogs where people loved them....well I am NOT in love. Maybe it is me, maybe it's my bathroom. I have mine in a full size bathtub/shower. The sprayer only sprays a quarter of the area. So what about the other 3/4 of my shower/tub??? Am I doing something wrong here?? I didn't think so, hang the thing on the shower and press the button....I would love to hear from anyone who has tried these and what you think of them. I think for one of those small shower stalls they make work good but not for someone putting one in a tub/shower combo.... comments???? (and please do not leave negative comments saying to just clean the normal way, i planned to but use this for in between to help make cleaning easier)