Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Learning how to use it.

I am pleased with this product. I have used both brand new and used Jar Lids with the sealer and generally have had great success. The hose with adapters came with my seal a meal and the trick is make sure your lid is clean and unbent and that your jar has nothing on the edge. Then after sealing, remove the hose 1st, otherwise you'll lose your seal. I have had to try more than one time to get a seal with both the wide mouth and regular jar sealer, but they generally work very well and I'm filling my pantry with dry and dehydrated goods. I've also used to extend the life of my extra, commercially canned Rotel tomatoes and diced tomatoes. I have 3 week old Rotel in fridge and I will heat it thoroughly but am content that it is safe.