The installers in this forum will no-doubt weigh-in on this question and you should heed their advice. Unfortunately the definition of "quality" varies considerably, so the best plan is to have a good set of expectations in advance and then see how closely the installer agrees with that. Determine what equipment you want and where it needs to be installed so you have a very good idea of the configuration in advance. If you are a DIY'er and have some affinity for this stuff, you can probably do a lot of the prep work yourself, like buying the best materials, running cables and grounds where you really want them, and installing the right connnectors the way you want them done. That is where some installers take the shortcuts, and the areas of greatest complaints per my observations in this forum. Another good idea is to be there at the time, make sure the installer is absolutely clear on what you want done before he starts work, then keep an eye on the progress. If there is something he can't or won't do, you'll know that up front and you can discuss the options, eliminating surprises and complaints later. Another thing you can do is volunteer to help. Some installers welcome that, others don't. That will also help minimize surprises. And if you have questions - well - you're in the right place...!
Good luck, and welcome...!
PS - The 722 is now available. Check with Claude at the DishStore...
PPS - If the installer does a great job for you, give him a nice tip. $20 to $50 is in line depending on the complexity and how much time he spent answering your questions, etc...