The ease at which it can be integrated into my system is one thing I love about this product! It has allowed me so much more flexibility than most other products out there for solar PV systems that are not battery backed up or even inverter powered (which would cost an arm & leg).
There isn't anything really negative here as far as features go - but if you're looking specifically around monitoring/data logging capabilities then some may find them lacking compared what others have available elsewhere like NetVanta etc.. We've been able use our existing equipment without having any additional costs associated by adding another piece onto their already expensive hardware setup we had previously used before purchasing from Sunverge Energy Solutions Ltd /Storge Edge Systems Incorporated!