Why to choose Roomba and Which modal?

Roomba : What it Can and Cannot Do

Executive summary: It is not fast, it is not smart, but it needs your help... but it will clean the carpeting.
In many cases, it does a great job of cleaning under matters. It can clean under the bed, under the dining table, et cetera.
The first couple of times you use the item, it doesn't save you any time at all, since you spend all of your time . Partly that is because it's interesting to see... but partly that's because you will need to see it to learn what it can manage and what it can't manage. You need to understand how to use it wisely. See section 2 for more about this.
It doesn't gracefully deal with clutter. You have to declutter the place before you turn the Roomba loose.

See section 2.

It can not be trusted to manage cords, speaker cables, et cetera. This is misleading, since at times it can creep over them or bounce them off; the thing is that occasionally it will not, so you can't leave the thing on its own unless each of the wires are out of their way.
It's quite likely to get stuck if there is a"low bridge" that it could almost get under. If the passage is actually low, it will only bounce off at the regular way. If the passage is truly high, it is going to pass under in the usual way. But if the passage is too little, and particularly in case it funnels down at a narrow angle, then the Roomba will become wedged. for more read the reviews here
The threthree-inchh"kick space" under front of normal cabinets forms a nasty Roomba snare, especially in the event the space extends two or more inches behind the front part of the cabinet. This seriously reduces the usefulness of the Roomba for crossing the kitchen floor.
Sunlight saturates the IR sensor. If glowing sunlight is falling on the item, it won't honor the virtual walls and will not reply to the handheld remote control.
It has a nasty tendency to end hair around brushes. Most of the hair gets wound up in easy-to-clean places, but also the nastiness results in another 10%, which operates its way into the bearings and gears and such.
A significant proportion of this cost-of-ownership of a Roomba is that the time spent cleaning out of the brushes and bearings. Compared to the first-generation versions, it has 3x more dirt-holding capacity and 3x greater battery freedom per charge -- both of which are extremely useful features.
Current versions are offered bundled together with two Virtual Walls. Those are helpful. I use them all the time.

The concept it will find its charging station when it requires a recharge is cute, but only 10 percent as practical as you could have expected. That's because there's only one charging station, but there are a lot of rooms that require cleaning. I detect carrying the Roomba from room to room easier than taking the charging station from room to room and finding somewhere to plug it in. So I just leave the charging station in 1 location. In different rooms, I only let the Roomba encounter till it stops, then carry it back into the charging station. Here is a good illustration of exactly what I mean.
Suppose you are vacuuming the dining area. You will need to vacuum under each of the seats.

With a typical vacuum cleaner, this is simple; you simply move the seat a couple of feet, vacuum in which it had been, and then move it back.
Having a Roomba, this is tricky. One laborious solution is to take all of the chairs out of this space, run the Roomba, and then carry all the seats back. In comparison to an ordinary vacuum, this necessitates moving each chair much farther, and requires having someplace else to maintain the seats for an hour or so.
A slightly cleverer solution would be to reverse up the chairs on the desk, as they occasionally do in the pizzeria at closing time. This allows nearly-unobstructed sweesweeping doesn't require moving the seats very much better.
A hasty solution entails two steps: First, make the seats in which they are and allow the Roomba clean around them. Then, move each seat into a nearby area that has been just washed, and then turn the Roomba loose again. This usually means that some areas of the space is going to be cleaned twice, though other components will only be cleaned after... but there is not anything wrong with this. My goal is to decrease the amount of work that I have to do, and if the Roomba has to do a little extra work, so be it.

The Roomba is unexpectedly dumb as it's to take care of a exhausted battery. Sometimes -- not always -- that the symptom is this: When it is on the chargerit thinks it is completely charged, but once you remove it off the charger it considers that the battery is empty. I'm not sure I know this, but it could possibly be related to this Roobma's non-understanding of open/loaded issue discussed under.
The battery pack may only be recharged a couple hundred times.
Typically whenever the battery fails, virtually every one the cells within the battery are still great; only one or two cells have died. How to use it

Thus, keep the old battery pack when you purchase a new one. The main reason is that if the second one fails, you can repair it by clipping out the terrible cell and replacing it with a great one from the other bunch.