Given the task definition and input, reply with output. In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.

We have installed four of these closely following the instructions and were hopeful they would work well for us. Activity increased and we waited since the instructions state, "Mole & Gopher Sonic Spike must be used continuously for 7-14 days before ground rodents start to move away from the area." These spikes have been in place over a month now. That was a mistake for us, since now it's too late for us to return them. The spikes are still out there beeping away and this morning the damage is worse with too much to get into the photographs. The cost of these four spikes plus the time to carefully install them correctly and now more yard, lawn, and garden damage! We do not recommend these Mole & Gopher Sonic Spikes.
Gopher activity worse now that these were installed a month ago!