The best review categories for Constellation are their plans and pricing, with an average of 3.0 stars, and the order experience, with an average of 3.0 stars.
Recent Good Review from Teech
New customer
I am a new customer, so I have no opinion at this time. As me again in 6 months. |
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Likely to recommend |
—
Teech
from
Machesney Park, IL
on
February 4th, 2023
Most Recent 5 Star Reviews
3 Customer Reviews Written Overall
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Good service
Constellation prices were consistent, easy access to account info. We had no problems to contact them. |
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Likely to recommend |
—
Gustafson
from
Cherry Valley, IL
on
March 17th, 2021
A rated company
Good company and no problems |
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Likely to recommend |
—
Barbara
from
Meredosia, IL
on
February 5th, 2020
Great experience
Called to make sure rate and paperwork were done correctly. Rep was nice and knowledgeable. Everything check out and my bill is not exorbitant. |
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Likely to recommend |
—
Good Rates And Nice Service
from
Hazel Crest, IL
on
June 5th, 2018

— Constellation
Most Recent 4 Star Reviews
1 Customer Reviews Written Overall
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Likely to recommend |
By far, happy!
I have had my service for 3 months for now; No problem so far :) Thanks |
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Likely to recommend |
—
Constellation
from
Chicago, IL
on
September 11th, 2018

— Constellation
Most Recent 3 Star Reviews
2 Customer Reviews Written Overall
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Likely to recommend |
New customer
I am a new customer, so I have no opinion at this time. As me again in 6 months. |
Plans & Pricing | |
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Likely to recommend |
—
Teech
from
Machesney Park, IL
on
February 4th, 2023
Bad experience
Constellation was told by Nicor that I couldn't switch even though I was within the 100 day time stamp according to Illinois law. Nicor was of no help. they just kept telling me no. Way to many people getting involved in this to get it right. I'm stuck with Nicor for a year according to them before I can switch. |
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Likely to recommend |
—
Bob Eckstrom
from
Alsip, IL
on
September 22nd, 2021
Most Recent 2 Star Reviews
1 Customer Reviews Written Overall
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Renewal Rip Off!!
They mislead you to wait until your renewal date when you phone in to get renewal rates and they are not competitive/ Therefore, you overpay for a month or two after the renewal because it takes that long to switch providers. |
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Likely to recommend |
—
LJ
from
Libertyville, IL
on
September 11th, 2018

— Constellation
Most Recent 1 Star Reviews
4 Customer Reviews Written Overall
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Has not started yet
Can not rate something that has not started on bill yet. |
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Likely to recommend |
—
Electric Delivery Service
from
Kirkland, IL
on
April 13th, 2023
CAUTION!!!
UNEXPECTEDLY my therm rate went from avg. .44 to $2.43!!-6 times my avg bill!! Contacting "customer service" is next to impossible. I pray this is a mistake! |
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Likely to recommend |
—
Dave
from
Lombard, IL
on
January 25th, 2021
Con game
Let 2 young women into my house who told me my utility companies would remain the same. This is B.S. I will cancel Constellation ASAP |
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Likely to recommend |
—
Marilyn Small
from
New Lenox, IL
on
October 6th, 2018
Someone messed up my order
On May 3 I went online and changed energy providers through illinois energy ratings.com. I received a confirmation e-mail and then, I have heard nothing. As a matter of fact, I received an e-mail on July 3 from Champion Energy, who had been my provider for the past few years, thanking me for renewing my contract with them. Someone dropped the ball and I don't know who, but it would appear my request for a new provider did not actually go through. |
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Likely to recommend |
—
Someone Messed Up My Order
from
Woodridge, IL
on
July 4th, 2018

— Constellation
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