Review title is Good so far [SEP] Love the convenience of this pen, just wish the gel would come out a better way. First off, it took FIVEver to expression the gel out. I think I clicked the bottom 50 times before a tiny bead of gel started to appear, I had to aggressively click and slam the pen onto the counter to get more product out. Once I was finally able to get enough product out, I dried my teeth (after flossing and brushing first) and wiped the silicone bristles onto my teeth from premolar to  premolar on my upper and lower teeth, I used the box it came in to fan and dry off my teeth. I did this before bed time so I wouldn’t have the urge to eat or drink after. The gel will become stringy once your inner lips and cheek touch the gel and there’s a mild taste to it.  So far I’ve used this pen nightly for 4 days and I’ve seen a tiny bit of results. You’re supposed to use it twice a day for 2 weeks. I haven’t experienced any sensitivity from the gel, partly because I’ll use sensodyne toothpaste to brush and the gel is formulated with potassium nitrate that helps prevent sensitivity. Other good ingredients include xylitol and natural antioxidants. Overall good product, just need a better way to get the product out without having to click it. Twisting would be a better option and maybe transparent packaging so you know how much product is left.