Is rec/nhai bond 100% guaranteed safe investment ?

Anyone Bought before share expiereince 

Regularly investing in these bonds (directly or even thr' agents) , no problem, direct ECS of interest and redemption till date.

 Advance tax as per quarter in which its transferred. Return to be filled as per norms.

Y You Regularly investing in these bonds   

Unless u Regularly Gaining Long term captial gain    jk  

Cuz  Interest is very low  that also will add in Income   so Unless No Capital gain  -- Everyone Should Avoid     

Naturally, only for LT CG exmption u/s. 54EC, with lock in period of just 3 years.