Gold wroteguys , ogero is not the best service if you want stable download and upload speed... they have an download caps for their unlimited plan, that means, whatever the hell they tell you , the speed will not go over 250 mbps...
I'm presuming you meant 250 KB/s, that being said I must say you're mistaken about Ogero's unlimited plan, as a unlimited user myself I have never experienced any form of FUP whatsoever in my nearly one year of using the unlimited service(as well as my 7 years of Ogero's DSL service, even during the free unlimited nights)
Once I downloaded 250 GB in a month and I haven't seen the slightest slowdown in the connection(some users here said they downloaded more and they never got FUP'd as well)
I would go as far to say Ogero offers the most stable connection by far (given the centrale office's equipments and wires are adequately up to date)
As far as the speed goes, I've noticed a stable download speed of roughly 200-220KB/s during all time of the day.