Door peephole viewer is easy to install. Love the live view from the mobile app (main reason I purchased it). However, I wasn't able to open live view over one weekend. App kept showing an error. Reached out to Brinno and was told that they were conducting some server maintenance over the weekend. The live view was only back online after the maintenance which took place over 2 days. Overall still happy with the purchase. Just hoping the maintence doesn't occur to often.