I thought I knew enough to put in my on wi fi router in the office and extender in the family room but the extender worked poorly in the family room where we needed it so we called Mark. He determined the extender was not compatible with the router so he replaced the extender with an "access" unit which I never had heard of. Also he found some never used cat5 wiring in our house which he rewired between the 2 units so now with the hard wire connection from router to access unit we have great wi fi all over the house. The unit required some programming which is way beyond me and Mark was easily familiar with what was needed. Now we feel like we are getting our moneys worth from Cox for the internet speeds we have been paying for these last years. While he was doing all this he changed the old hard drive in our office desk top to the newer solid state drive which I didn't know was the new option for hard drives. This drive upgrade to our 3 year old slow pc surely will get us a few more years use and it is already noticeably faster. We'll follow up soon for same upgrade on our laptop pc. Having Mark available for computer work now that we're retired is like having an IT department to call like when I was in the office world. You will be satisfied with results.