I am not interested in a specific product recommendation in answer to this question (like the existing iPhone question), but rather the key attributes to consider when buying a smartphone mount. Please be detailed and specific when describing each attribute and the pros and cons of different choices. Two example attributes:
- Mount held by twist ties or screws?
- Is the mount universal or model specific?
For each attribute please indicate whether there are trade-offs between choices or whether you always want to go with one choice.