What are your thoughts on ETFs?

I am considering investing in following ETFs for long term (5+years): 1. Nippon India ETF GoldBees 2. Nippon India ETF PSU Bank Bees 3. CPSE ETF 4. Motilal Oswal NASDAQ 100 ETF / Mirae Asset NYSE FANG+ ETF

Is Investing in above ETFs a good option at current price? Please share your thoughts and advice. Thanks