I love how simple it is to create my own magazine, whether that be in HTML or with an app like this one! The templates are also really nice too which makes creating your first issue very easy indeed (in fact you can easily edit anything afterwards as well).
There aren't any major downsides at present but maybe there will arise later down the line once more people start using them regularly? They're great if you've got some spare time when starting up something new because they make getting started easier than ever before! We have been producing our weekly newsletter since we launched so far without even thinking about these services initially.