Well I can only base on personal experience but 19 years ago my HV was so incompetent I refused to use the service and made a formal complaint. If the service is to be offered in an overbearing way then in my opinion one or two improvements need still to be made including:
Making mutually convenient appointments - mine turned up on the step at 9am when I had a 12 day old baby with no attempt to make an appointment - no attempt at basic courtesy, no apology for coming at an inconvenient time.
Telling the truth about the service being optional and not demanding attendance at if I may say, rather dirty clinics where one had to wait adjacent to the sick visiting the doctor.
Being able to use the scales properly and not getting arsy when one points out they read -xx kg when the baby went on; and when it appears because of the incorrectly set scales that the baby has lost weight rather than just writing it in the book to notice there might be a problem.
Not seeing people with food stains down their cardi
If mother asks questions for example about immunisation to be able to answer them in a comprehensive and intelligent manner rather than reading out the leaflet
Not writing to the local head of immunology about your concerns because your baby has breathing problems - my baby didn't have breathing problems.
If one has problems breast feeding to be able to provide evidence based help and advice if the HV is intent upon telling a mother they must persevere and breast is better than bottle. Do not instruct me to do something when you have no expertise in that area whatsoever.
If there is paperwork to fill, then fill it accurately.
In short the service I received was discourteous and totally incompetent and I felt I was better able to pick up problems with my dc that than the HV. Posters talk about what they pick up; I am more concerned about what I am sure they miss or disregard.
If a mother thinks there is a problem with her baby she needs to visit the GP and ask for a referral to a specialist. The HV cannot do that.
IMO it's a service with extremely high levels of incompetence and disinterest and the money would be better spent having more time at GP level for new mothers who could identify potential issues and refer to other agencies, with sound reasons shared with the parents, so that specialist support can be professionally identified and targetted.
After my son was born and beyond 8 weeks I formally refused to have anything to do with the service ever again, made a form complaint which was upheld and was within my rights to refuse their services which are by the way not mandatory but that is not clearly explained to women. I asked the question at least three times and did not get a straight answer until I met with the Director of the local health trust.