I flew a very early Citation III for over 4 years.
Looks nice, stand up cabin, lots of baggage space, trailing link gear, pretty simple checklists and systems.
Only 7200 lbs of fuel means limited range, you have to get high to make it any long distance, it's certified to 51,000 but we were told it would never make it there unless your empty in back land on fumes. I've been up 45,000 a few times when we had to, I don't think we ever tried for 47,000. Has boosted ailerons, and only electric trims, no manual, has a jack screw pitch control on the stab, the procedure for a jammed stab at high speed is kind of a hand full for landing. Has bleed air over the windshield's for de-icing, you have to get them on early on the descent or you will fog up big time, especially in FL. The very early APU is junk, especially in the summer, that's why they changed them to different models.
First time I sat in it I thought I was in a bucket with the yoke ahead and even with my shoulders. I was used to the Hawker where you sit kind of high and the yoke is lower. It's a finger tip plane, light and sensitive on the controls. I always thought it was squirrely near and on the ground, maybe the VII's were better, never flew one, but I never looked forward to crosswinds, ever. Had a weird erratic kickback on the rudder peddles while taxiing in a crosswind, never felt that in any other plane. It's a high speed sprinter with limited range. The wing is made for high altitudes and not so much near the ground.
At the same numbers against the Hawker 700, the 700 will pull about 300-400 lbs more off the ground.