I did mine part time, on the grounds that I was working on the same airfield as a good school, and thus could save myself a lot of time and money - just take afternoons off for lessons, and so-on.
I passed, first time. That's the good bit.
I also suffered enormous numbers of delays, cancellations, and was regularly turning up still worrying about whatever had been that morning's problem at work. The erratic continuity meant that my rate of learning was much shallower than would have been ideal. My guess is that I ended up flying about 15 hours more than I would have done had I done it intensively - that's a lot of money at CPL training rates.
I learned a lot, and enjoyed it; the school were excellent and I'd be happy to recommend them to anybody. But I really wouldn't do it that way if I was starting again - I'd take four weeks off work, and spend it thinking about nothing else at a flying school somewhere the weather's halfway decent which, where I work, it isn't for a lot of the year.
Had I gone to Florida to do it, in retrospect, the extra cost of travel and accomodation would probably have been about a third of the extra cost here due to my too-shallow learning curve.
Bite the bullet and do it intensively, it will make the most sense.