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Well I am on DHP and in the past the main drawback has been that Dish thinks of DHP customers last for upgrade offers. But recently they have been making offers available to DHP subs. Like the 510 offer and 6000 offer. Also the new cool equipment is being made available to DHP members first like the 322 & 522. However I am not sure if the 921 will be made available to DHP subs. that is a $1000 unit and Charlie said on a Charlie Chat he was not sure if that would be available to DHP customers.
The benefit of DHP is it works like the cable company for service. If you have a problem you call and they fix. They own the equipment so if a box breaks they will mail you a new one and you send the broken box back in that package postage paid. Or they come and replace the receiver. My wife and I were nervous when we first moved to satellite because of the cable company smear campaign commercials, so we fealt most comfortable knowing that being a DHP sub service would not be an issue. Knowing that satellite is reliable and looking back now, I would like to own the equipment, but also enjoy the peace of mind knowing if if I have a a problem or am out of town, my wife can get service free of charge. The DHP is not a bad deal as long as you are getting a lot of TVs connected. It also makes sense to people because the Dish Extended warrantee costs something like $1.99 a month - but I heard discussion that now there are two warrantees available now with the other costing $4.99.
I am one who never falls for the the extended warrantee scam retailers try and levy but if you do purchase Dish equipment definitely get the warrantee direct from Dish Network. The only problem with the warrantee is that you have to pay for shipping and as a DHP customer you don't have to worry about any of that nonsense.