Observer Wards

I know 2 good uses of this:

1. When playing 2v2 vs. no invs heroes get these and put in the woods and water.

2. Late game when it's Roshan killing time place these near him so you can see if the enemies are killing him or as sentries to alert youre team when you are killing him.

anti gangbang/gank... useful but under estimated and set aside...

I have a replay where these little beauties turned around the outcome of a 1v1.

these dont see invisible units/heros and they cost more but what people dont realize is that they last longer and thier sight range is every bit as good choosing between the 2 types of wards is situational and these can reall save ur @$$

very useful if ur goblin technies and ur plantin mines in a lane. ull see someone comin unless they r invis like rikimaru, bounty hunter, bone klinkz, nerubian assasin, etc.

go mass wards for total map control... almost like maphack

anti gang bang and backdoor item.

i used this item they say i got mh

6.45 observers suck. You can only buy 3 sets at once and after that you have to wait 6 MINUTES before a new set appears! OMG and what is wards' duration Yeah 6 MINUTES! No more mh! Now more than ever teams might have to pick Treant/Weaver for their scouts.

It is 3 charges... Drew update the information.

How big is the area of vision these wards create?

@lupeman is there an item u haven't commented on!?!?

lupeman has comments for all items and heroes >_<

least used ite,

Are these wards visible to enemy units? In other words can other observer wards see them or would you need sentry wards?