This is good quality band with a sturdy frame, attractive display (though it's NOT an Always-On Display), very responsive touch screen, reliable activity tracking monitors, push notifications (for SMS, WhatsApp, weather, calls etc) and robust strap. The band is water-resistant as well.
The downside as already mentioned above is that it's on an AOD smartband, has 5 customisable faces to load at any one time (the selection has 20+ default faces but only 5 can be used at any one time) and is not shock proof.
If you're looking for a budget band that gives you plenty of features and has a smart look to it go for it. If you want a more aesthetically pleasing and AOD display (AMOLED etc), need a wider range of features with deeper ability and throwing away cash is not a problem for you then don't go for it.
Another important thing to know is that Realme doesn't entertain warranty claims for Realme Band 2 now since its support for this band has stopped. But it's a reliable smartband and as far as I know its failure rates are insignificant.