I just got interested in rollers after a club mate offered me some. Spring weather has been so poor that I've spent more time indoors than ever before and fancied something other than my KK.
It took me 5-10 mins to go solo with help from an experienced rollers rider, and was start/stopping solo within about 20 mins. I doubt I'd have made it at all if I'd been on my own for the first time.... I ride next to a length of workbench in the garage, with that for support on only one side when I start, and have never tried in a doorway. Its only been a week, and about 5 sessions solo but I have been able to start riding confidently and am stable in the centre of the alu rollers, on the hoods & 1-handed. Not managed hands off yet and a first go at 1-leg didnt go too well either /img/vbsmilies/smilies/redface.gif I've been able to ride at FTP easily enough on 3.5" rollers (275w) and managed a few blasts >300w, but I see these most suited to L3 & L4 work as once I get exhausted on higher intensity intervals its certainly harder to stay balanced. I suspect that at high intensity I'll either hold back the efforts to maintain stability or go hard and lose concentration and stability - neither sounds ideal, so I'll keep the KK for anything >L4. Big challenge compared to the turbo is reaching for, and using, a sweat towel once you're going hard, so I suspect the occasional stop for a wipe and drink will be an essential component of future sessions until I totally master the balance thing. I also set up my laptop on the bench in front of me, with Golden Cheetah v3 running in realtime training mode so I can constantly monitor power, cadence and HR over time during the session. Its a great training aid for any indoor session.
Surprising thing to me was that after only a couple of rides on the rollers, probably totaling <1hr, on my next road ride I was already more aware of my pedal stroke and being more smooth. Being able to get on the rollers quickly and easily will certainly mean these get more use, and alternating with turbo trainer sessions will add a lot of variety to next winter.
One tip for beginners I havent seen anywhere, that helped me hugely, was to keep only the lightest grip on the bars. I had a death grip that caused all sorts of balance issues but when I was constantly reminded to wiggle my fingers and relax my shoulders it all came together nicely!