HUDs are a interesting tool to use. Yes i have one and love what it gets me. The problem is it is also very easy to missus and hurt your games.
The good part about a HUD is you can track everything you do, You see in real time what your stats are and its nice to see what your image is at any time. PY4 is my HUD when i play somewhere and can use it. The best part of this is after your done playing. Every hand and information of your game is there for you to use and analyze you game and others to see if you made mistake and more.
The bad part about HUDS. There are 2 separate issues here.
issue 1. They could hurt your live play. HUDS are great when multi tabling but if you plan to play live or if possible be more of a player they do hurt you live game skills. You need to read players. I am not talking about
tells but what you read on players as they play. When you see what they do you can see mush more than the
hands would tell you on a HUD and even have information faster. You may see a player with 15 hands with a VIP of 5.0 and belive he is a nit and you HUT will agree. But it could be he just had trash cards. Now you see a UNG open raise. and he shows A3o after the hand. What does this tell. you. I HUD will still say NIT. but the hand he raised UNG shows he is not. Lets say you start a new game and a player you have seen before come up very tight, You played him twice. Once he raise 100% of hands and was go fast. Next time he was blinded out over 75 hand. If you watch player online over the HUD it will make you a better player and you will see issues faster.
Issue 2 we did hit in 1 too but the stats can lie to you. Yes they may cbet 100% of hands but if it is always a min bet they are not being over aggressive just a bit weird. Some stats are really usefull like 3bets. Problem is you may need. 1000 hands to start to get accurate information. All they need is one hot run to skew the stats. Even 1000 hands are not enough to honestly know a player. While it will be usefully for VIP RFI and calling at 1000 hands some stats may take 10000 hands to be usefull. Now for a big issue people dont think about. Players change. A very laggy player may start to learn the game and start playing tight poker. You still have him as a lag and the stats will take a few thousand hand to show the change. But you end up loosing so them now. If your watching them play you will see the change and can adjust you play and notws in realy time.
LAst but not least, Depending where you play and games, how ofton do you play the same players? to make HUD stats usefull you really need alot of hand against a player. THis about how ofton you play them and how long you play them. You see the issue.
I o like HUDS but they should not be used as a crutch.