Hi,
I have used a wrist bp monitor for almost 4 years. It works great! You can sit next to a kitchen table, or and arm chair. Bend your arm, almost in a right degree angle, and rest it on the table or arm chair. That works best.
By the way, the next time you go to the doctor's office, bring it with you. Have the doctor take your pressure with his cuff, then about 5 minutes later while still in his office, take yours with the wrist monitor. Then you'll be able to see if yours is calibrated correctly. I did that with mine, and it was off only 1 or 2 points. The doctor said that was fine.
Hope this helps.