I have been using the Gemini Exchange since a year now. Few of the pros and cons:
- Easy sign up process, you can get $10 by signing up using my referral link
- Security using SMS.
- A number of major currencies are supported (USD, AUD, CAD, SGD, HKD etc)
- Debit card deposit does not incur any fees.
- Good for long term investors who use Dollar Cost Averaging investing method.
- Good projects/coins are listed.
- Not suitable for day trading as spot pricing is not supported.
Overall i will give this exchange a 4/5 as its suitable for long term investors.