Is $150 to install a pool booster pump a fair price?

My pool guy indicated our booster pump head failed and he could get it replaced under warranty. I wasn't home when they did the installation so I couldn't do any sort of final inspection of the work. I've had some issues with the quality of work from our pool guy so I wanted to know if this specific issue was something to make a stink out of. I'm less focused on the rusted piece and more focused on the fact that it wasn't driven all the way down. I'm not really knowledgeable on pool stuff, so forgive my ignorance. I'm likely going to just let this go but there is a part of me that is bugged by it not being put back to its original state. We have a number of trees including a very tall redwood tree near our pool.